diff options
Diffstat (limited to 'drivers/char')
-rw-r--r-- | drivers/char/Kconfig | 2 | ||||
-rw-r--r-- | drivers/char/agp/frontend.c | 1 | ||||
-rw-r--r-- | drivers/char/applicom.c | 1 | ||||
-rw-r--r-- | drivers/char/hw_random/Kconfig | 101 | ||||
-rw-r--r-- | drivers/char/hw_random/Makefile | 1 | ||||
-rw-r--r-- | drivers/char/hw_random/bcm2835-rng.c | 10 | ||||
-rw-r--r-- | drivers/char/hw_random/n2-drv.c | 24 | ||||
-rw-r--r-- | drivers/char/hw_random/omap-rng.c | 4 | ||||
-rw-r--r-- | drivers/char/hw_random/picoxcell-rng.c | 181 | ||||
-rw-r--r-- | drivers/char/hw_random/timeriomem-rng.c | 4 | ||||
-rw-r--r-- | drivers/char/ipmi/Kconfig | 12 | ||||
-rw-r--r-- | drivers/char/ipmi/ipmi_bt_sm.c | 2 | ||||
-rw-r--r-- | drivers/char/ipmi/ipmi_kcs_sm.c | 5 | ||||
-rw-r--r-- | drivers/char/ipmi/ipmi_msghandler.c | 239 | ||||
-rw-r--r-- | drivers/char/ipmi/ipmi_si_intf.c | 147 | ||||
-rw-r--r-- | drivers/char/pcmcia/Kconfig | 2 | ||||
-rw-r--r-- | drivers/char/random.c | 12 | ||||
-rw-r--r-- | drivers/char/tpm/tpm_acpi.c | 4 | ||||
-rw-r--r-- | drivers/char/tpm/tpm_ppi.c | 8 | ||||
-rw-r--r-- | drivers/char/ttyprintk.c | 15 |
20 files changed, 343 insertions, 432 deletions
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig index fbae63e3d304..6e9f74a5c095 100644 --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -40,7 +40,7 @@ config SGI_MBCS source "drivers/tty/serial/Kconfig" config TTY_PRINTK - bool "TTY driver to output user messages via printk" + tristate "TTY driver to output user messages via printk" depends on EXPERT && TTY default n ---help--- diff --git a/drivers/char/agp/frontend.c b/drivers/char/agp/frontend.c index 8121b4c70ede..b29703324e94 100644 --- a/drivers/char/agp/frontend.c +++ b/drivers/char/agp/frontend.c @@ -730,6 +730,7 @@ static int agpioc_info_wrap(struct agp_file_private *priv, void __user *arg) agp_copy_info(agp_bridge, &kerninfo); + memset(&userinfo, 0, sizeof(userinfo)); userinfo.version.major = kerninfo.version.major; userinfo.version.minor = kerninfo.version.minor; userinfo.bridge_id = kerninfo.device->vendor | diff --git a/drivers/char/applicom.c b/drivers/char/applicom.c index 974321a2508d..14790304b84b 100644 --- a/drivers/char/applicom.c +++ b/drivers/char/applicom.c @@ -345,7 +345,6 @@ out: free_irq(apbs[i].irq, &dummy); iounmap(apbs[i].RamIO); } - pci_disable_device(dev); return ret; } diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig index 244759bbd7b7..836b061ced35 100644 --- a/drivers/char/hw_random/Kconfig +++ b/drivers/char/hw_random/Kconfig @@ -2,7 +2,7 @@ # Hardware Random Number Generator (RNG) configuration # -config HW_RANDOM +menuconfig HW_RANDOM tristate "Hardware Random Number Generator Core support" default m ---help--- @@ -20,9 +20,11 @@ config HW_RANDOM If unsure, say Y. +if HW_RANDOM + config HW_RANDOM_TIMERIOMEM tristate "Timer IOMEM HW Random Number Generator support" - depends on HW_RANDOM && HAS_IOMEM + depends on HAS_IOMEM ---help--- This driver provides kernel-side support for a generic Random Number Generator used by reading a 'dumb' iomem address that @@ -36,7 +38,7 @@ config HW_RANDOM_TIMERIOMEM config HW_RANDOM_INTEL tristate "Intel HW Random Number Generator support" - depends on HW_RANDOM && (X86 || IA64) && PCI + depends on (X86 || IA64) && PCI default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -49,7 +51,7 @@ config HW_RANDOM_INTEL config HW_RANDOM_AMD tristate "AMD HW Random Number Generator support" - depends on HW_RANDOM && (X86 || PPC_MAPLE) && PCI + depends on (X86 || PPC_MAPLE) && PCI default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -62,8 +64,8 @@ config HW_RANDOM_AMD config HW_RANDOM_ATMEL tristate "Atmel Random Number Generator support" - depends on HW_RANDOM && HAVE_CLK - default (HW_RANDOM && ARCH_AT91) + depends on ARCH_AT91 && HAVE_CLK + default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number Generator hardware found on Atmel AT91 devices. @@ -75,7 +77,7 @@ config HW_RANDOM_ATMEL config HW_RANDOM_BCM63XX tristate "Broadcom BCM63xx Random Number Generator support" - depends on HW_RANDOM && BCM63XX + depends on BCM63XX default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -88,7 +90,7 @@ config HW_RANDOM_BCM63XX config HW_RANDOM_BCM2835 tristate "Broadcom BCM2835 Random Number Generator support" - depends on HW_RANDOM && ARCH_BCM2835 + depends on ARCH_BCM2835 default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -101,7 +103,7 @@ config HW_RANDOM_BCM2835 config HW_RANDOM_GEODE tristate "AMD Geode HW Random Number Generator support" - depends on HW_RANDOM && X86_32 && PCI + depends on X86_32 && PCI default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -114,7 +116,7 @@ config HW_RANDOM_GEODE config HW_RANDOM_N2RNG tristate "Niagara2 Random Number Generator support" - depends on HW_RANDOM && SPARC64 + depends on SPARC64 default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -127,7 +129,7 @@ config HW_RANDOM_N2RNG config HW_RANDOM_VIA tristate "VIA HW Random Number Generator support" - depends on HW_RANDOM && X86 + depends on X86 default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -140,7 +142,7 @@ config HW_RANDOM_VIA config HW_RANDOM_IXP4XX tristate "Intel IXP4xx NPU HW Pseudo-Random Number Generator support" - depends on HW_RANDOM && ARCH_IXP4XX + depends on ARCH_IXP4XX default HW_RANDOM ---help--- This driver provides kernel-side support for the Pseudo-Random @@ -153,7 +155,7 @@ config HW_RANDOM_IXP4XX config HW_RANDOM_OMAP tristate "OMAP Random Number Generator support" - depends on HW_RANDOM && (ARCH_OMAP16XX || ARCH_OMAP2PLUS) + depends on ARCH_OMAP16XX || ARCH_OMAP2PLUS default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -167,7 +169,7 @@ config HW_RANDOM_OMAP config HW_RANDOM_OMAP3_ROM tristate "OMAP3 ROM Random Number Generator support" - depends on HW_RANDOM && ARCH_OMAP3 + depends on ARCH_OMAP3 default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -180,7 +182,7 @@ config HW_RANDOM_OMAP3_ROM config HW_RANDOM_OCTEON tristate "Octeon Random Number Generator support" - depends on HW_RANDOM && CAVIUM_OCTEON_SOC + depends on CAVIUM_OCTEON_SOC default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -193,7 +195,7 @@ config HW_RANDOM_OCTEON config HW_RANDOM_PASEMI tristate "PA Semi HW Random Number Generator support" - depends on HW_RANDOM && PPC_PASEMI + depends on PPC_PASEMI default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -206,7 +208,7 @@ config HW_RANDOM_PASEMI config HW_RANDOM_VIRTIO tristate "VirtIO Random Number Generator support" - depends on HW_RANDOM && VIRTIO + depends on VIRTIO ---help--- This driver provides kernel-side support for the virtual Random Number Generator hardware. @@ -216,7 +218,7 @@ config HW_RANDOM_VIRTIO config HW_RANDOM_TX4939 tristate "TX4939 Random Number Generator support" - depends on HW_RANDOM && SOC_TX4939 + depends on SOC_TX4939 default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -229,7 +231,8 @@ config HW_RANDOM_TX4939 config HW_RANDOM_MXC_RNGA tristate "Freescale i.MX RNGA Random Number Generator" - depends on HW_RANDOM && ARCH_HAS_RNGA + depends on ARCH_HAS_RNGA + default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number Generator hardware found on Freescale i.MX processors. @@ -241,7 +244,8 @@ config HW_RANDOM_MXC_RNGA config HW_RANDOM_NOMADIK tristate "ST-Ericsson Nomadik Random Number Generator support" - depends on HW_RANDOM && ARCH_NOMADIK + depends on ARCH_NOMADIK + default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number Generator hardware found on ST-Ericsson SoCs (8815 and 8500). @@ -251,21 +255,10 @@ config HW_RANDOM_NOMADIK If unsure, say Y. -config HW_RANDOM_PICOXCELL - tristate "Picochip picoXcell true random number generator support" - depends on HW_RANDOM && ARCH_PICOXCELL && PICOXCELL_PC3X3 - ---help--- - This driver provides kernel-side support for the Random Number - Generator hardware found on Picochip PC3x3 and later devices. - - To compile this driver as a module, choose M here: the - module will be called picoxcell-rng. - - If unsure, say Y. - config HW_RANDOM_PPC4XX tristate "PowerPC 4xx generic true random number generator support" - depends on HW_RANDOM && PPC && 4xx + depends on PPC && 4xx + default HW_RANDOM ---help--- This driver provides the kernel-side support for the TRNG hardware found in the security function of some PowerPC 4xx SoCs. @@ -275,24 +268,9 @@ config HW_RANDOM_PPC4XX If unsure, say N. -config UML_RANDOM - depends on UML - tristate "Hardware random number generator" - help - This option enables UML's "hardware" random number generator. It - attaches itself to the host's /dev/random, supplying as much entropy - as the host has, rather than the small amount the UML gets from its - own drivers. It registers itself as a standard hardware random number - generator, major 10, minor 183, and the canonical device name is - /dev/hwrng. - The way to make use of this is to install the rng-tools package - (check your distro, or download from - http://sourceforge.net/projects/gkernel/). rngd periodically reads - /dev/hwrng and injects the entropy into /dev/random. - config HW_RANDOM_PSERIES tristate "pSeries HW Random Number Generator support" - depends on HW_RANDOM && PPC64 && IBMVIO + depends on PPC64 && IBMVIO default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -305,7 +283,7 @@ config HW_RANDOM_PSERIES config HW_RANDOM_POWERNV tristate "PowerNV Random Number Generator support" - depends on HW_RANDOM && PPC_POWERNV + depends on PPC_POWERNV default HW_RANDOM ---help--- This is the driver for Random Number Generator hardware found @@ -318,7 +296,8 @@ config HW_RANDOM_POWERNV config HW_RANDOM_EXYNOS tristate "EXYNOS HW random number generator support" - depends on HW_RANDOM && HAS_IOMEM && HAVE_CLK + depends on ARCH_EXYNOS + default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number Generator hardware found on EXYNOS SOCs. @@ -330,7 +309,7 @@ config HW_RANDOM_EXYNOS config HW_RANDOM_TPM tristate "TPM HW Random Number Generator support" - depends on HW_RANDOM && TCG_TPM + depends on TCG_TPM default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -344,6 +323,7 @@ config HW_RANDOM_TPM config HW_RANDOM_MSM tristate "Qualcomm SoCs Random Number Generator support" depends on HW_RANDOM && ARCH_QCOM + default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number Generator hardware found on Qualcomm SoCs. @@ -352,3 +332,20 @@ config HW_RANDOM_MSM module will be called msm-rng. If unsure, say Y. + +endif # HW_RANDOM + +config UML_RANDOM + depends on UML + tristate "Hardware random number generator" + help + This option enables UML's "hardware" random number generator. It + attaches itself to the host's /dev/random, supplying as much entropy + as the host has, rather than the small amount the UML gets from its + own drivers. It registers itself as a standard hardware random number + generator, major 10, minor 183, and the canonical device name is + /dev/hwrng. + The way to make use of this is to install the rng-tools package + (check your distro, or download from + http://sourceforge.net/projects/gkernel/). rngd periodically reads + /dev/hwrng and injects the entropy into /dev/random. diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile index 3ae7755a52e7..199ed283e149 100644 --- a/drivers/char/hw_random/Makefile +++ b/drivers/char/hw_random/Makefile @@ -22,7 +22,6 @@ obj-$(CONFIG_HW_RANDOM_TX4939) += tx4939-rng.o obj-$(CONFIG_HW_RANDOM_MXC_RNGA) += mxc-rnga.o obj-$(CONFIG_HW_RANDOM_OCTEON) += octeon-rng.o obj-$(CONFIG_HW_RANDOM_NOMADIK) += nomadik-rng.o -obj-$(CONFIG_HW_RANDOM_PICOXCELL) += picoxcell-rng.o obj-$(CONFIG_HW_RANDOM_PPC4XX) += ppc4xx-rng.o obj-$(CONFIG_HW_RANDOM_PSERIES) += pseries-rng.o obj-$(CONFIG_HW_RANDOM_POWERNV) += powernv-rng.o diff --git a/drivers/char/hw_random/bcm2835-rng.c b/drivers/char/hw_random/bcm2835-rng.c index 8c3b255e629a..e900961cdd2e 100644 --- a/drivers/char/hw_random/bcm2835-rng.c +++ b/drivers/char/hw_random/bcm2835-rng.c @@ -61,18 +61,18 @@ static int bcm2835_rng_probe(struct platform_device *pdev) } bcm2835_rng_ops.priv = (unsigned long)rng_base; + /* set warm-up count & enable */ + __raw_writel(RNG_WARMUP_COUNT, rng_base + RNG_STATUS); + __raw_writel(RNG_RBGEN, rng_base + RNG_CTRL); + /* register driver */ err = hwrng_register(&bcm2835_rng_ops); if (err) { dev_err(dev, "hwrng registration failed\n"); iounmap(rng_base); - } else { + } else dev_info(dev, "hwrng registered\n"); - /* set warm-up count & enable */ - __raw_writel(RNG_WARMUP_COUNT, rng_base + RNG_STATUS); - __raw_writel(RNG_RBGEN, rng_base + RNG_CTRL); - } return err; } diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c index 432232eefe05..292a5889f675 100644 --- a/drivers/char/hw_random/n2-drv.c +++ b/drivers/char/hw_random/n2-drv.c @@ -632,7 +632,7 @@ static int n2rng_probe(struct platform_device *op) multi_capable = (match->data != NULL); n2rng_driver_version(); - np = kzalloc(sizeof(*np), GFP_KERNEL); + np = devm_kzalloc(&op->dev, sizeof(*np), GFP_KERNEL); if (!np) goto out; np->op = op; @@ -653,7 +653,7 @@ static int n2rng_probe(struct platform_device *op) &np->hvapi_minor)) { dev_err(&op->dev, "Cannot register suitable " "HVAPI version.\n"); - goto out_free; + goto out; } } @@ -676,15 +676,16 @@ static int n2rng_probe(struct platform_device *op) dev_info(&op->dev, "Registered RNG HVAPI major %lu minor %lu\n", np->hvapi_major, np->hvapi_minor); - np->units = kzalloc(sizeof(struct n2rng_unit) * np->num_units, - GFP_KERNEL); + np->units = devm_kzalloc(&op->dev, + sizeof(struct n2rng_unit) * np->num_units, + GFP_KERNEL); err = -ENOMEM; if (!np->units) goto out_hvapi_unregister; err = n2rng_init_control(np); if (err) - goto out_free_units; + goto out_hvapi_unregister; dev_info(&op->dev, "Found %s RNG, units: %d\n", ((np->flags & N2RNG_FLAG_MULTI) ? @@ -697,7 +698,7 @@ static int n2rng_probe(struct platform_device *op) err = hwrng_register(&np->hwrng); if (err) - goto out_free_units; + goto out_hvapi_unregister; platform_set_drvdata(op, np); @@ -705,15 +706,9 @@ static int n2rng_probe(struct platform_device *op) return 0; -out_free_units: - kfree(np->units); - np->units = NULL; - out_hvapi_unregister: sun4v_hvapi_unregister(HV_GRP_RNG); -out_free: - kfree(np); out: return err; } @@ -730,11 +725,6 @@ static int n2rng_remove(struct platform_device *op) sun4v_hvapi_unregister(HV_GRP_RNG); - kfree(np->units); - np->units = NULL; - - kfree(np); - return 0; } diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c index 9b89ff4881de..f66ea258382f 100644 --- a/drivers/char/hw_random/omap-rng.c +++ b/drivers/char/hw_random/omap-rng.c @@ -369,10 +369,8 @@ static int omap_rng_probe(struct platform_device *pdev) int ret; priv = devm_kzalloc(dev, sizeof(struct omap_rng_dev), GFP_KERNEL); - if (!priv) { - dev_err(&pdev->dev, "could not allocate memory\n"); + if (!priv) return -ENOMEM; - }; omap_rng_ops.priv = (unsigned long)priv; platform_set_drvdata(pdev, priv); diff --git a/drivers/char/hw_random/picoxcell-rng.c b/drivers/char/hw_random/picoxcell-rng.c deleted file mode 100644 index eab5448ad56f..000000000000 --- a/drivers/char/hw_random/picoxcell-rng.c +++ /dev/null @@ -1,181 +0,0 @@ -/* - * Copyright (c) 2010-2011 Picochip Ltd., Jamie Iles - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * All enquiries to support@picochip.com - */ -#include <linux/clk.h> -#include <linux/delay.h> -#include <linux/err.h> -#include <linux/hw_random.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> - -#define DATA_REG_OFFSET 0x0200 -#define CSR_REG_OFFSET 0x0278 -#define CSR_OUT_EMPTY_MASK (1 << 24) -#define CSR_FAULT_MASK (1 << 1) -#define TRNG_BLOCK_RESET_MASK (1 << 0) -#define TAI_REG_OFFSET 0x0380 - -/* - * The maximum amount of time in microseconds to spend waiting for data if the - * core wants us to wait. The TRNG should generate 32 bits every 320ns so a - * timeout of 20us seems reasonable. The TRNG does builtin tests of the data - * for randomness so we can't always assume there is data present. - */ -#define PICO_TRNG_TIMEOUT 20 - -static void __iomem *rng_base; -static struct clk *rng_clk; -static struct device *rng_dev; - -static inline u32 picoxcell_trng_read_csr(void) -{ - return __raw_readl(rng_base + CSR_REG_OFFSET); -} - -static inline bool picoxcell_trng_is_empty(void) -{ - return picoxcell_trng_read_csr() & CSR_OUT_EMPTY_MASK; -} - -/* - * Take the random number generator out of reset and make sure the interrupts - * are masked. We shouldn't need to get large amounts of random bytes so just - * poll the status register. The hardware generates 32 bits every 320ns so we - * shouldn't have to wait long enough to warrant waiting for an IRQ. - */ -static void picoxcell_trng_start(void) -{ - __raw_writel(0, rng_base + TAI_REG_OFFSET); - __raw_writel(0, rng_base + CSR_REG_OFFSET); -} - -static void picoxcell_trng_reset(void) -{ - __raw_writel(TRNG_BLOCK_RESET_MASK, rng_base + CSR_REG_OFFSET); - __raw_writel(TRNG_BLOCK_RESET_MASK, rng_base + TAI_REG_OFFSET); - picoxcell_trng_start(); -} - -/* - * Get some random data from the random number generator. The hw_random core - * layer provides us with locking. - */ -static int picoxcell_trng_read(struct hwrng *rng, void *buf, size_t max, - bool wait) -{ - int i; - - /* Wait for some data to become available. */ - for (i = 0; i < PICO_TRNG_TIMEOUT && picoxcell_trng_is_empty(); ++i) { - if (!wait) - return 0; - - udelay(1); - } - - if (picoxcell_trng_read_csr() & CSR_FAULT_MASK) { - dev_err(rng_dev, "fault detected, resetting TRNG\n"); - picoxcell_trng_reset(); - return -EIO; - } - - if (i == PICO_TRNG_TIMEOUT) - return 0; - - *(u32 *)buf = __raw_readl(rng_base + DATA_REG_OFFSET); - return sizeof(u32); -} - -static struct hwrng picoxcell_trng = { - .name = "picoxcell", - .read = picoxcell_trng_read, -}; - -static int picoxcell_trng_probe(struct platform_device *pdev) -{ - int ret; - struct resource *mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - - rng_base = devm_ioremap_resource(&pdev->dev, mem); - if (IS_ERR(rng_base)) - return PTR_ERR(rng_base); - - rng_clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(rng_clk)) { - dev_warn(&pdev->dev, "no clk\n"); - return PTR_ERR(rng_clk); - } - - ret = clk_enable(rng_clk); - if (ret) { - dev_warn(&pdev->dev, "unable to enable clk\n"); - return ret; - } - - picoxcell_trng_start(); - ret = hwrng_register(&picoxcell_trng); - if (ret) - goto err_register; - - rng_dev = &pdev->dev; - dev_info(&pdev->dev, "pixoxcell random number generator active\n"); - - return 0; - -err_register: - clk_disable(rng_clk); - return ret; -} - -static int picoxcell_trng_remove(struct platform_device *pdev) -{ - hwrng_unregister(&picoxcell_trng); - clk_disable(rng_clk); - - return 0; -} - -#ifdef CONFIG_PM -static int picoxcell_trng_suspend(struct device *dev) -{ - clk_disable(rng_clk); - - return 0; -} - -static int picoxcell_trng_resume(struct device *dev) -{ - return clk_enable(rng_clk); -} - -static const struct dev_pm_ops picoxcell_trng_pm_ops = { - .suspend = picoxcell_trng_suspend, - .resume = picoxcell_trng_resume, -}; -#endif /* CONFIG_PM */ - -static struct platform_driver picoxcell_trng_driver = { - .probe = picoxcell_trng_probe, - .remove = picoxcell_trng_remove, - .driver = { - .name = "picoxcell-trng", - .owner = THIS_MODULE, -#ifdef CONFIG_PM - .pm = &picoxcell_trng_pm_ops, -#endif /* CONFIG_PM */ - }, -}; - -module_platform_driver(picoxcell_trng_driver); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Jamie Iles"); -MODULE_DESCRIPTION("Picochip picoXcell TRNG driver"); diff --git a/drivers/char/hw_random/timeriomem-rng.c b/drivers/char/hw_random/timeriomem-rng.c index 439ff8b28c43..b6ab9ac3f34d 100644 --- a/drivers/char/hw_random/timeriomem-rng.c +++ b/drivers/char/hw_random/timeriomem-rng.c @@ -120,10 +120,8 @@ static int timeriomem_rng_probe(struct platform_device *pdev) /* Allocate memory for the device structure (and zero it) */ priv = devm_kzalloc(&pdev->dev, sizeof(struct timeriomem_rng_private_data), GFP_KERNEL); - if (!priv) { - dev_err(&pdev->dev, "failed to allocate device structure.\n"); + if (!priv) return -ENOMEM; - } platform_set_drvdata(pdev, priv); diff --git a/drivers/char/ipmi/Kconfig b/drivers/char/ipmi/Kconfig index 0baa8fab4ea7..db1c9b7adaa6 100644 --- a/drivers/char/ipmi/Kconfig +++ b/drivers/char/ipmi/Kconfig @@ -50,6 +50,18 @@ config IPMI_SI Currently, only KCS and SMIC are supported. If you are using IPMI, you should probably say "y" here. +config IPMI_SI_PROBE_DEFAULTS + bool 'Probe for all possible IPMI system interfaces by default' + default n + depends on IPMI_SI + help + Modern systems will usually expose IPMI interfaces via a discoverable + firmware mechanism such as ACPI or DMI. Older systems do not, and so + the driver is forced to probe hardware manually. This may cause boot + delays. Say "n" here to disable this manual probing. IPMI will then + only be available on older systems if the "ipmi_si_intf.trydefaults=1" + boot argument is passed. + config IPMI_WATCHDOG tristate 'IPMI Watchdog Timer' help diff --git a/drivers/char/ipmi/ipmi_bt_sm.c b/drivers/char/ipmi/ipmi_bt_sm.c index f5e4cd7617f6..61e71616689b 100644 --- a/drivers/char/ipmi/ipmi_bt_sm.c +++ b/drivers/char/ipmi/ipmi_bt_sm.c @@ -352,7 +352,7 @@ static inline void write_all_bytes(struct si_sm_data *bt) static inline int read_all_bytes(struct si_sm_data *bt) { - unsigned char i; + unsigned int i; /* * length is "framing info", minimum = 4: NetFn, Seq, Cmd, cCode. diff --git a/drivers/char/ipmi/ipmi_kcs_sm.c b/drivers/char/ipmi/ipmi_kcs_sm.c index 6a4bdc18955a..8c25f596808a 100644 --- a/drivers/char/ipmi/ipmi_kcs_sm.c +++ b/drivers/char/ipmi/ipmi_kcs_sm.c @@ -251,8 +251,9 @@ static inline int check_obf(struct si_sm_data *kcs, unsigned char status, if (!GET_STATUS_OBF(status)) { kcs->obf_timeout -= time; if (kcs->obf_timeout < 0) { - start_error_recovery(kcs, "OBF not ready in time"); - return 1; + kcs->obf_timeout = OBF_RETRY_TIMEOUT; + start_error_recovery(kcs, "OBF not ready in time"); + return 1; } return 0; } diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c index ec4e10fcf1a5..e6db9381b2c7 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -55,6 +55,7 @@ static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void); static int ipmi_init_msghandler(void); static void smi_recv_tasklet(unsigned long); static void handle_new_recv_msgs(ipmi_smi_t intf); +static void need_waiter(ipmi_smi_t intf); static int initialized; @@ -73,14 +74,28 @@ static struct proc_dir_entry *proc_ipmi_root; */ #define MAX_MSG_TIMEOUT 60000 +/* Call every ~1000 ms. */ +#define IPMI_TIMEOUT_TIME 1000 + +/* How many jiffies does it take to get to the timeout time. */ +#define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000) + +/* + * Request events from the queue every second (this is the number of + * IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the + * future, IPMI will add a way to know immediately if an event is in + * the queue and this silliness can go away. + */ +#define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME)) + /* * The main "user" data structure. */ struct ipmi_user { struct list_head link; - /* Set to "0" when the user is destroyed. */ - int valid; + /* Set to false when the user is destroyed. */ + bool valid; struct kref refcount; @@ -92,7 +107,7 @@ struct ipmi_user { ipmi_smi_t intf; /* Does this interface receive IPMI events? */ - int gets_events; + bool gets_events; }; struct cmd_rcvr { @@ -383,6 +398,9 @@ struct ipmi_smi { unsigned int waiting_events_count; /* How many events in queue? */ char delivering_events; char event_msg_printed; + atomic_t event_waiters; + unsigned int ticks_to_req_ev; + int last_needs_timer; /* * The event receiver for my BMC, only really used at panic @@ -395,7 +413,7 @@ struct ipmi_smi { /* For handling of maintenance mode. */ int maintenance_mode; - int maintenance_mode_enable; + bool maintenance_mode_enable; int auto_maintenance_timeout; spinlock_t maintenance_mode_lock; /* Used in a timer... */ @@ -451,7 +469,6 @@ static DEFINE_MUTEX(ipmi_interfaces_mutex); static LIST_HEAD(smi_watchers); static DEFINE_MUTEX(smi_watchers_mutex); - #define ipmi_inc_stat(intf, stat) \ atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat]) #define ipmi_get_stat(intf, stat) \ @@ -772,6 +789,7 @@ static int intf_next_seq(ipmi_smi_t intf, *seq = i; *seqid = intf->seq_table[i].seqid; intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ; + need_waiter(intf); } else { rv = -EAGAIN; } @@ -941,7 +959,7 @@ int ipmi_create_user(unsigned int if_num, new_user->handler = handler; new_user->handler_data = handler_data; new_user->intf = intf; - new_user->gets_events = 0; + new_user->gets_events = false; if (!try_module_get(intf->handlers->owner)) { rv = -ENODEV; @@ -962,10 +980,15 @@ int ipmi_create_user(unsigned int if_num, */ mutex_unlock(&ipmi_interfaces_mutex); - new_user->valid = 1; + new_user->valid = true; spin_lock_irqsave(&intf->seq_lock, flags); list_add_rcu(&new_user->link, &intf->users); spin_unlock_irqrestore(&intf->seq_lock, flags); + if (handler->ipmi_watchdog_pretimeout) { + /* User wants pretimeouts, so make sure to watch for them. */ + if (atomic_inc_return(&intf->event_waiters) == 1) + need_waiter(intf); + } *user = new_user; return 0; @@ -1019,7 +1042,13 @@ int ipmi_destroy_user(ipmi_user_t user) struct cmd_rcvr *rcvr; struct cmd_rcvr *rcvrs = NULL; - user->valid = 0; + user->valid = false; + + if (user->handler->ipmi_watchdog_pretimeout) + atomic_dec(&intf->event_waiters); + + if (user->gets_events) + atomic_dec(&intf->event_waiters); /* Remove the user from the interface's sequence table. */ spin_lock_irqsave(&intf->seq_lock, flags); @@ -1155,25 +1184,23 @@ int ipmi_set_maintenance_mode(ipmi_user_t user, int mode) if (intf->maintenance_mode != mode) { switch (mode) { case IPMI_MAINTENANCE_MODE_AUTO: - intf->maintenance_mode = mode; intf->maintenance_mode_enable = (intf->auto_maintenance_timeout > 0); break; case IPMI_MAINTENANCE_MODE_OFF: - intf->maintenance_mode = mode; - intf->maintenance_mode_enable = 0; + intf->maintenance_mode_enable = false; break; case IPMI_MAINTENANCE_MODE_ON: - intf->maintenance_mode = mode; - intf->maintenance_mode_enable = 1; + intf->maintenance_mode_enable = true; break; default: rv = -EINVAL; goto out_unlock; } + intf->maintenance_mode = mode; maintenance_mode_update(intf); } @@ -1184,7 +1211,7 @@ int ipmi_set_maintenance_mode(ipmi_user_t user, int mode) } EXPORT_SYMBOL(ipmi_set_maintenance_mode); -int ipmi_set_gets_events(ipmi_user_t user, int val) +int ipmi_set_gets_events(ipmi_user_t user, bool val) { unsigned long flags; ipmi_smi_t intf = user->intf; @@ -1194,8 +1221,18 @@ int ipmi_set_gets_events(ipmi_user_t user, int val) INIT_LIST_HEAD(&msgs); spin_lock_irqsave(&intf->events_lock, flags); + if (user->gets_events == val) + goto out; + user->gets_events = val; + if (val) { + if (atomic_inc_return(&intf->event_waiters) == 1) + need_waiter(intf); + } else { + atomic_dec(&intf->event_waiters); + } + if (intf->delivering_events) /* * Another thread is delivering events for this, so @@ -1289,6 +1326,9 @@ int ipmi_register_for_cmd(ipmi_user_t user, goto out_unlock; } + if (atomic_inc_return(&intf->event_waiters) == 1) + need_waiter(intf); + list_add_rcu(&rcvr->link, &intf->cmd_rcvrs); out_unlock: @@ -1330,6 +1370,7 @@ int ipmi_unregister_for_cmd(ipmi_user_t user, mutex_unlock(&intf->cmd_rcvrs_mutex); synchronize_rcu(); while (rcvrs) { + atomic_dec(&intf->event_waiters); rcvr = rcvrs; rcvrs = rcvr->next; kfree(rcvr); @@ -1535,7 +1576,7 @@ static int i_ipmi_request(ipmi_user_t user, = IPMI_MAINTENANCE_MODE_TIMEOUT; if (!intf->maintenance_mode && !intf->maintenance_mode_enable) { - intf->maintenance_mode_enable = 1; + intf->maintenance_mode_enable = true; maintenance_mode_update(intf); } spin_unlock_irqrestore(&intf->maintenance_mode_lock, @@ -2876,6 +2917,8 @@ int ipmi_register_smi(struct ipmi_smi_handlers *handlers, (unsigned long) intf); atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0); spin_lock_init(&intf->events_lock); + atomic_set(&intf->event_waiters, 0); + intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; INIT_LIST_HEAD(&intf->waiting_events); intf->waiting_events_count = 0; mutex_init(&intf->cmd_rcvrs_mutex); @@ -3965,7 +4008,8 @@ smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg, static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, struct list_head *timeouts, long timeout_period, - int slot, unsigned long *flags) + int slot, unsigned long *flags, + unsigned int *waiting_msgs) { struct ipmi_recv_msg *msg; struct ipmi_smi_handlers *handlers; @@ -3977,8 +4021,10 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, return; ent->timeout -= timeout_period; - if (ent->timeout > 0) + if (ent->timeout > 0) { + (*waiting_msgs)++; return; + } if (ent->retries_left == 0) { /* The message has used all its retries. */ @@ -3995,6 +4041,8 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, struct ipmi_smi_msg *smi_msg; /* More retries, send again. */ + (*waiting_msgs)++; + /* * Start with the max timer, set to normal timer after * the message is sent. @@ -4040,117 +4088,118 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent, } } -static void ipmi_timeout_handler(long timeout_period) +static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, long timeout_period) { - ipmi_smi_t intf; struct list_head timeouts; struct ipmi_recv_msg *msg, *msg2; unsigned long flags; int i; + unsigned int waiting_msgs = 0; - rcu_read_lock(); - list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { - tasklet_schedule(&intf->recv_tasklet); - - /* - * Go through the seq table and find any messages that - * have timed out, putting them in the timeouts - * list. - */ - INIT_LIST_HEAD(&timeouts); - spin_lock_irqsave(&intf->seq_lock, flags); - for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) - check_msg_timeout(intf, &(intf->seq_table[i]), - &timeouts, timeout_period, i, - &flags); - spin_unlock_irqrestore(&intf->seq_lock, flags); + /* + * Go through the seq table and find any messages that + * have timed out, putting them in the timeouts + * list. + */ + INIT_LIST_HEAD(&timeouts); + spin_lock_irqsave(&intf->seq_lock, flags); + for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++) + check_msg_timeout(intf, &(intf->seq_table[i]), + &timeouts, timeout_period, i, + &flags, &waiting_msgs); + spin_unlock_irqrestore(&intf->seq_lock, flags); - list_for_each_entry_safe(msg, msg2, &timeouts, link) - deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE); + list_for_each_entry_safe(msg, msg2, &timeouts, link) + deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE); - /* - * Maintenance mode handling. Check the timeout - * optimistically before we claim the lock. It may - * mean a timeout gets missed occasionally, but that - * only means the timeout gets extended by one period - * in that case. No big deal, and it avoids the lock - * most of the time. - */ + /* + * Maintenance mode handling. Check the timeout + * optimistically before we claim the lock. It may + * mean a timeout gets missed occasionally, but that + * only means the timeout gets extended by one period + * in that case. No big deal, and it avoids the lock + * most of the time. + */ + if (intf->auto_maintenance_timeout > 0) { + spin_lock_irqsave(&intf->maintenance_mode_lock, flags); if (intf->auto_maintenance_timeout > 0) { - spin_lock_irqsave(&intf->maintenance_mode_lock, flags); - if (intf->auto_maintenance_timeout > 0) { - intf->auto_maintenance_timeout - -= timeout_period; - if (!intf->maintenance_mode - && (intf->auto_maintenance_timeout <= 0)) { - intf->maintenance_mode_enable = 0; - maintenance_mode_update(intf); - } + intf->auto_maintenance_timeout + -= timeout_period; + if (!intf->maintenance_mode + && (intf->auto_maintenance_timeout <= 0)) { + intf->maintenance_mode_enable = false; + maintenance_mode_update(intf); } - spin_unlock_irqrestore(&intf->maintenance_mode_lock, - flags); } + spin_unlock_irqrestore(&intf->maintenance_mode_lock, + flags); } - rcu_read_unlock(); + + tasklet_schedule(&intf->recv_tasklet); + + return waiting_msgs; } -static void ipmi_request_event(void) +static void ipmi_request_event(ipmi_smi_t intf) { - ipmi_smi_t intf; struct ipmi_smi_handlers *handlers; - rcu_read_lock(); - /* - * Called from the timer, no need to check if handlers is - * valid. - */ - list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { - /* No event requests when in maintenance mode. */ - if (intf->maintenance_mode_enable) - continue; + /* No event requests when in maintenance mode. */ + if (intf->maintenance_mode_enable) + return; - handlers = intf->handlers; - if (handlers) - handlers->request_events(intf->send_info); - } - rcu_read_unlock(); + handlers = intf->handlers; + if (handlers) + handlers->request_events(intf->send_info); } static struct timer_list ipmi_timer; -/* Call every ~1000 ms. */ -#define IPMI_TIMEOUT_TIME 1000 - -/* How many jiffies does it take to get to the timeout time. */ -#define IPMI_TIMEOUT_JIFFIES ((IPMI_TIMEOUT_TIME * HZ) / 1000) - -/* - * Request events from the queue every second (this is the number of - * IPMI_TIMEOUT_TIMES between event requests). Hopefully, in the - * future, IPMI will add a way to know immediately if an event is in - * the queue and this silliness can go away. - */ -#define IPMI_REQUEST_EV_TIME (1000 / (IPMI_TIMEOUT_TIME)) - static atomic_t stop_operation; -static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME; static void ipmi_timeout(unsigned long data) { + ipmi_smi_t intf; + int nt = 0; + if (atomic_read(&stop_operation)) return; - ticks_to_req_ev--; - if (ticks_to_req_ev == 0) { - ipmi_request_event(); - ticks_to_req_ev = IPMI_REQUEST_EV_TIME; - } + rcu_read_lock(); + list_for_each_entry_rcu(intf, &ipmi_interfaces, link) { + int lnt = 0; + + if (atomic_read(&intf->event_waiters)) { + intf->ticks_to_req_ev--; + if (intf->ticks_to_req_ev == 0) { + ipmi_request_event(intf); + intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME; + } + lnt++; + } - ipmi_timeout_handler(IPMI_TIMEOUT_TIME); + lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME); - mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); + lnt = !!lnt; + if (lnt != intf->last_needs_timer && + intf->handlers->set_need_watch) + intf->handlers->set_need_watch(intf->send_info, lnt); + intf->last_needs_timer = lnt; + + nt += lnt; + } + rcu_read_unlock(); + + if (nt) + mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); } +static void need_waiter(ipmi_smi_t intf) +{ + /* Racy, but worst case we start the timer twice. */ + if (!timer_pending(&ipmi_timer)) + mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES); +} static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0); static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0); diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c index b7efd3c1a882..5d665680ae33 100644 --- a/drivers/char/ipmi/ipmi_si_intf.c +++ b/drivers/char/ipmi/ipmi_si_intf.c @@ -217,7 +217,7 @@ struct smi_info { unsigned char msg_flags; /* Does the BMC have an event buffer? */ - char has_event_buffer; + bool has_event_buffer; /* * If set to true, this will request events the next time the @@ -230,7 +230,7 @@ struct smi_info { * call. Generally used after a panic to make sure stuff goes * out. */ - int run_to_completion; + bool run_to_completion; /* The I/O port of an SI interface. */ int port; @@ -248,19 +248,25 @@ struct smi_info { /* The timer for this si. */ struct timer_list si_timer; + /* This flag is set, if the timer is running (timer_pending() isn't enough) */ + bool timer_running; + /* The time (in jiffies) the last timeout occurred at. */ unsigned long last_timeout_jiffies; /* Used to gracefully stop the timer without race conditions. */ atomic_t stop_operation; + /* Are we waiting for the events, pretimeouts, received msgs? */ + atomic_t need_watch; + /* * The driver will disable interrupts when it gets into a * situation where it cannot handle messages due to lack of * memory. Once that situation clears up, it will re-enable * interrupts. */ - int interrupt_disabled; + bool interrupt_disabled; /* From the get device id response... */ struct ipmi_device_id device_id; @@ -273,7 +279,7 @@ struct smi_info { * True if we allocated the device, false if it came from * someplace else (like PCI). */ - int dev_registered; + bool dev_registered; /* Slave address, could be reported from DMI. */ unsigned char slave_addr; @@ -297,19 +303,19 @@ struct smi_info { static int force_kipmid[SI_MAX_PARMS]; static int num_force_kipmid; #ifdef CONFIG_PCI -static int pci_registered; +static bool pci_registered; #endif #ifdef CONFIG_ACPI -static int pnp_registered; +static bool pnp_registered; #endif #ifdef CONFIG_PARISC -static int parisc_registered; +static bool parisc_registered; #endif static unsigned int kipmid_max_busy_us[SI_MAX_PARMS]; static int num_max_busy_us; -static int unload_when_empty = 1; +static bool unload_when_empty = true; static int add_smi(struct smi_info *smi); static int try_smi_init(struct smi_info *smi); @@ -434,6 +440,13 @@ static void start_clear_flags(struct smi_info *smi_info) smi_info->si_state = SI_CLEARING_FLAGS; } +static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val) +{ + smi_info->last_timeout_jiffies = jiffies; + mod_timer(&smi_info->si_timer, new_val); + smi_info->timer_running = true; +} + /* * When we have a situtaion where we run out of memory and cannot * allocate messages, we just leave them in the BMC and run the system @@ -444,10 +457,9 @@ static inline void disable_si_irq(struct smi_info *smi_info) { if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { start_disable_irq(smi_info); - smi_info->interrupt_disabled = 1; + smi_info->interrupt_disabled = true; if (!atomic_read(&smi_info->stop_operation)) - mod_timer(&smi_info->si_timer, - jiffies + SI_TIMEOUT_JIFFIES); + smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); } } @@ -455,7 +467,7 @@ static inline void enable_si_irq(struct smi_info *smi_info) { if ((smi_info->irq) && (smi_info->interrupt_disabled)) { start_enable_irq(smi_info); - smi_info->interrupt_disabled = 0; + smi_info->interrupt_disabled = false; } } @@ -700,7 +712,7 @@ static void handle_transaction_done(struct smi_info *smi_info) dev_warn(smi_info->dev, "Maybe ok, but ipmi might run very slowly.\n"); } else - smi_info->interrupt_disabled = 0; + smi_info->interrupt_disabled = false; smi_info->si_state = SI_NORMAL; break; } @@ -853,6 +865,19 @@ static enum si_sm_result smi_event_handler(struct smi_info *smi_info, return si_sm_result; } +static void check_start_timer_thread(struct smi_info *smi_info) +{ + if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) { + smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); + + if (smi_info->thread) + wake_up_process(smi_info->thread); + + start_next_msg(smi_info); + smi_event_handler(smi_info, 0); + } +} + static void sender(void *send_info, struct ipmi_smi_msg *msg, int priority) @@ -906,27 +931,11 @@ static void sender(void *send_info, else list_add_tail(&msg->link, &smi_info->xmit_msgs); - if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) { - /* - * last_timeout_jiffies is updated here to avoid - * smi_timeout() handler passing very large time_diff - * value to smi_event_handler() that causes - * the send command to abort. - */ - smi_info->last_timeout_jiffies = jiffies; - - mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES); - - if (smi_info->thread) - wake_up_process(smi_info->thread); - - start_next_msg(smi_info); - smi_event_handler(smi_info, 0); - } + check_start_timer_thread(smi_info); spin_unlock_irqrestore(&smi_info->si_lock, flags); } -static void set_run_to_completion(void *send_info, int i_run_to_completion) +static void set_run_to_completion(void *send_info, bool i_run_to_completion) { struct smi_info *smi_info = send_info; enum si_sm_result result; @@ -998,12 +1007,23 @@ static int ipmi_thread(void *data) struct timespec busy_until; ipmi_si_set_not_busy(&busy_until); - set_user_nice(current, 19); + set_user_nice(current, MAX_NICE); while (!kthread_should_stop()) { int busy_wait; spin_lock_irqsave(&(smi_info->si_lock), flags); smi_result = smi_event_handler(smi_info, 0); + + /* + * If the driver is doing something, there is a possible + * race with the timer. If the timer handler see idle, + * and the thread here sees something else, the timer + * handler won't restart the timer even though it is + * required. So start it here if necessary. + */ + if (smi_result != SI_SM_IDLE && !smi_info->timer_running) + smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES); + spin_unlock_irqrestore(&(smi_info->si_lock), flags); busy_wait = ipmi_thread_busy_wait(smi_result, smi_info, &busy_until); @@ -1011,9 +1031,15 @@ static int ipmi_thread(void *data) ; /* do nothing */ else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait) schedule(); - else if (smi_result == SI_SM_IDLE) - schedule_timeout_interruptible(100); - else + else if (smi_result == SI_SM_IDLE) { + if (atomic_read(&smi_info->need_watch)) { + schedule_timeout_interruptible(100); + } else { + /* Wait to be woken up when we are needed. */ + __set_current_state(TASK_INTERRUPTIBLE); + schedule(); + } + } else schedule_timeout_interruptible(1); } return 0; @@ -1024,7 +1050,7 @@ static void poll(void *send_info) { struct smi_info *smi_info = send_info; unsigned long flags = 0; - int run_to_completion = smi_info->run_to_completion; + bool run_to_completion = smi_info->run_to_completion; /* * Make sure there is some delay in the poll loop so we can @@ -1049,6 +1075,17 @@ static void request_events(void *send_info) atomic_set(&smi_info->req_events, 1); } +static void set_need_watch(void *send_info, bool enable) +{ + struct smi_info *smi_info = send_info; + unsigned long flags; + + atomic_set(&smi_info->need_watch, enable); + spin_lock_irqsave(&smi_info->si_lock, flags); + check_start_timer_thread(smi_info); + spin_unlock_irqrestore(&smi_info->si_lock, flags); +} + static int initialized; static void smi_timeout(unsigned long data) @@ -1073,10 +1110,6 @@ static void smi_timeout(unsigned long data) * SI_USEC_PER_JIFFY); smi_result = smi_event_handler(smi_info, time_diff); - spin_unlock_irqrestore(&(smi_info->si_lock), flags); - - smi_info->last_timeout_jiffies = jiffies_now; - if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { /* Running with interrupts, only do long timeouts. */ timeout = jiffies + SI_TIMEOUT_JIFFIES; @@ -1098,7 +1131,10 @@ static void smi_timeout(unsigned long data) do_mod_timer: if (smi_result != SI_SM_IDLE) - mod_timer(&(smi_info->si_timer), timeout); + smi_mod_timer(smi_info, timeout); + else + smi_info->timer_running = false; + spin_unlock_irqrestore(&(smi_info->si_lock), flags); } static irqreturn_t si_irq_handler(int irq, void *data) @@ -1146,8 +1182,7 @@ static int smi_start_processing(void *send_info, /* Set up the timer that drives the interface. */ setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi); - new_smi->last_timeout_jiffies = jiffies; - mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES); + smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES); /* * Check if the user forcefully enabled the daemon. @@ -1188,7 +1223,7 @@ static int get_smi_info(void *send_info, struct ipmi_smi_info *data) return 0; } -static void set_maintenance_mode(void *send_info, int enable) +static void set_maintenance_mode(void *send_info, bool enable) { struct smi_info *smi_info = send_info; @@ -1202,6 +1237,7 @@ static struct ipmi_smi_handlers handlers = { .get_smi_info = get_smi_info, .sender = sender, .request_events = request_events, + .set_need_watch = set_need_watch, .set_maintenance_mode = set_maintenance_mode, .set_run_to_completion = set_run_to_completion, .poll = poll, @@ -1229,7 +1265,7 @@ static bool si_tryplatform = 1; #ifdef CONFIG_PCI static bool si_trypci = 1; #endif -static bool si_trydefaults = 1; +static bool si_trydefaults = IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS); static char *si_type[SI_MAX_PARMS]; #define MAX_SI_TYPE_STR 30 static char si_type_str[MAX_SI_TYPE_STR]; @@ -1328,7 +1364,7 @@ module_param_array(force_kipmid, int, &num_force_kipmid, 0); MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or" " disabled(0). Normally the IPMI driver auto-detects" " this, but the value may be overridden by this parm."); -module_param(unload_when_empty, int, 0); +module_param(unload_when_empty, bool, 0); MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are" " specified or found, default is 1. Setting to 0" " is useful for hot add of devices using hotmod."); @@ -3336,18 +3372,19 @@ static int try_smi_init(struct smi_info *new_smi) INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs)); new_smi->curr_msg = NULL; atomic_set(&new_smi->req_events, 0); - new_smi->run_to_completion = 0; + new_smi->run_to_completion = false; for (i = 0; i < SI_NUM_STATS; i++) atomic_set(&new_smi->stats[i], 0); - new_smi->interrupt_disabled = 1; + new_smi->interrupt_disabled = true; atomic_set(&new_smi->stop_operation, 0); + atomic_set(&new_smi->need_watch, 0); new_smi->intf_num = smi_num; smi_num++; rv = try_enable_event_buffer(new_smi); if (rv == 0) - new_smi->has_event_buffer = 1; + new_smi->has_event_buffer = true; /* * Start clearing the flags before we enable interrupts or the @@ -3381,7 +3418,7 @@ static int try_smi_init(struct smi_info *new_smi) rv); goto out_err; } - new_smi->dev_registered = 1; + new_smi->dev_registered = true; } rv = ipmi_register_smi(&handlers, @@ -3430,7 +3467,7 @@ static int try_smi_init(struct smi_info *new_smi) wait_for_timer_and_thread(new_smi); out_err: - new_smi->interrupt_disabled = 1; + new_smi->interrupt_disabled = true; if (new_smi->intf) { ipmi_unregister_smi(new_smi->intf); @@ -3466,7 +3503,7 @@ static int try_smi_init(struct smi_info *new_smi) if (new_smi->dev_registered) { platform_device_unregister(new_smi->pdev); - new_smi->dev_registered = 0; + new_smi->dev_registered = false; } return rv; @@ -3521,14 +3558,14 @@ static int init_ipmi_si(void) printk(KERN_ERR PFX "Unable to register " "PCI driver: %d\n", rv); else - pci_registered = 1; + pci_registered = true; } #endif #ifdef CONFIG_ACPI if (si_tryacpi) { pnp_register_driver(&ipmi_pnp_driver); - pnp_registered = 1; + pnp_registered = true; } #endif @@ -3544,7 +3581,7 @@ static int init_ipmi_si(void) #ifdef CONFIG_PARISC register_parisc_driver(&ipmi_parisc_driver); - parisc_registered = 1; + parisc_registered = true; /* poking PC IO addresses will crash machine, don't do it */ si_trydefaults = 0; #endif diff --git a/drivers/char/pcmcia/Kconfig b/drivers/char/pcmcia/Kconfig index b27f5342fe76..8d3dfb0c8a26 100644 --- a/drivers/char/pcmcia/Kconfig +++ b/drivers/char/pcmcia/Kconfig @@ -15,7 +15,7 @@ config SYNCLINK_CS This driver may be built as a module ( = code which can be inserted in and removed from the running kernel whenever you want). - The module will be called synclinkmp. If you want to do that, say M + The module will be called synclink_cs. If you want to do that, say M here. config CARDMAN_4000 diff --git a/drivers/char/random.c b/drivers/char/random.c index 6b75713d953a..4ad71ef2cd59 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -902,6 +902,7 @@ void add_disk_randomness(struct gendisk *disk) add_timer_randomness(disk->random, 0x100 + disk_devt(disk)); trace_add_disk_randomness(disk_devt(disk), ENTROPY_BITS(&input_pool)); } +EXPORT_SYMBOL_GPL(add_disk_randomness); #endif /********************************************************************* @@ -995,8 +996,11 @@ retry: ibytes = min_t(size_t, ibytes, have_bytes - reserved); if (ibytes < min) ibytes = 0; - entropy_count = max_t(int, 0, - entropy_count - (ibytes << (ENTROPY_SHIFT + 3))); + if (have_bytes >= ibytes + reserved) + entropy_count -= ibytes << (ENTROPY_SHIFT + 3); + else + entropy_count = reserved << (ENTROPY_SHIFT + 3); + if (cmpxchg(&r->entropy_count, orig, entropy_count) != orig) goto retry; @@ -1578,10 +1582,10 @@ static int proc_do_uuid(struct ctl_table *table, int write, /* * Return entropy available scaled to integral bits */ -static int proc_do_entropy(ctl_table *table, int write, +static int proc_do_entropy(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { - ctl_table fake_table; + struct ctl_table fake_table; int entropy_count; entropy_count = *(int *)table->data >> ENTROPY_SHIFT; diff --git a/drivers/char/tpm/tpm_acpi.c b/drivers/char/tpm/tpm_acpi.c index b9a57fa4b710..565a9478cb94 100644 --- a/drivers/char/tpm/tpm_acpi.c +++ b/drivers/char/tpm/tpm_acpi.c @@ -95,7 +95,7 @@ int read_log(struct tpm_bios_log *log) log->bios_event_log_end = log->bios_event_log + len; - virt = acpi_os_map_memory(start, len); + virt = acpi_os_map_iomem(start, len); if (!virt) { kfree(log->bios_event_log); printk("%s: ERROR - Unable to map memory\n", __func__); @@ -104,6 +104,6 @@ int read_log(struct tpm_bios_log *log) memcpy_fromio(log->bios_event_log, virt, len); - acpi_os_unmap_memory(virt, len); + acpi_os_unmap_iomem(virt, len); return 0; } diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c index b3ea223585bd..61dcc8011ec7 100644 --- a/drivers/char/tpm/tpm_ppi.c +++ b/drivers/char/tpm/tpm_ppi.c @@ -328,13 +328,11 @@ int tpm_add_ppi(struct kobject *parent) /* Cache TPM ACPI handle and version string */ acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX, ppi_callback, NULL, NULL, &tpm_ppi_handle); - if (tpm_ppi_handle == NULL) - return -ENODEV; - - return sysfs_create_group(parent, &ppi_attr_grp); + return tpm_ppi_handle ? sysfs_create_group(parent, &ppi_attr_grp) : 0; } void tpm_remove_ppi(struct kobject *parent) { - sysfs_remove_group(parent, &ppi_attr_grp); + if (tpm_ppi_handle) + sysfs_remove_group(parent, &ppi_attr_grp); } diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c index daea84c41743..a15ce4ef39cd 100644 --- a/drivers/char/ttyprintk.c +++ b/drivers/char/ttyprintk.c @@ -17,7 +17,7 @@ #include <linux/device.h> #include <linux/serial.h> #include <linux/tty.h> -#include <linux/export.h> +#include <linux/module.h> struct ttyprintk_port { struct tty_port port; @@ -210,10 +210,19 @@ static int __init ttyprintk_init(void) return 0; error: - tty_unregister_driver(ttyprintk_driver); put_tty_driver(ttyprintk_driver); tty_port_destroy(&tpk_port.port); - ttyprintk_driver = NULL; return ret; } + +static void __exit ttyprintk_exit(void) +{ + tty_unregister_driver(ttyprintk_driver); + put_tty_driver(ttyprintk_driver); + tty_port_destroy(&tpk_port.port); +} + device_initcall(ttyprintk_init); +module_exit(ttyprintk_exit); + +MODULE_LICENSE("GPL"); |