diff options
Diffstat (limited to 'drivers/rtc/dev.c')
| -rw-r--r-- | drivers/rtc/dev.c | 53 |
1 files changed, 42 insertions, 11 deletions
diff --git a/drivers/rtc/dev.c b/drivers/rtc/dev.c index 1d006ef4bb57..5b8ebe86124a 100644 --- a/drivers/rtc/dev.c +++ b/drivers/rtc/dev.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * RTC subsystem, dev interface * @@ -5,14 +6,11 @@ * Author: Alessandro Zummo <a.zummo@towertech.it> * * based on arch/arm/common/rtctime.c - * - * 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. -*/ + */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/compat.h> #include <linux/module.h> #include <linux/rtc.h> #include <linux/sched/signal.h> @@ -60,7 +58,7 @@ static void rtc_uie_task(struct work_struct *work) } else if (rtc->oldsecs != tm.tm_sec) { num = (tm.tm_sec + 60 - rtc->oldsecs) % 60; rtc->oldsecs = tm.tm_sec; - rtc->uie_timer.expires = jiffies + HZ - (HZ/10); + rtc->uie_timer.expires = jiffies + HZ - (HZ / 10); rtc->uie_timer_active = 1; rtc->uie_task_active = 0; add_timer(&rtc->uie_timer); @@ -71,6 +69,7 @@ static void rtc_uie_task(struct work_struct *work) if (num) rtc_handle_legacy_irq(rtc, num, RTC_UF); } + static void rtc_uie_timer(struct timer_list *t) { struct rtc_device *rtc = from_timer(rtc, t, uie_timer); @@ -202,14 +201,14 @@ static __poll_t rtc_dev_poll(struct file *file, poll_table *wait) } static long rtc_dev_ioctl(struct file *file, - unsigned int cmd, unsigned long arg) + unsigned int cmd, unsigned long arg) { int err = 0; struct rtc_device *rtc = file->private_data; const struct rtc_class_ops *ops = rtc->ops; struct rtc_time tm; struct rtc_wkalrm alarm; - void __user *uarg = (void __user *) arg; + void __user *uarg = (void __user *)arg; err = mutex_lock_interruptible(&rtc->ops_lock); if (err) @@ -233,7 +232,7 @@ static long rtc_dev_ioctl(struct file *file, case RTC_PIE_ON: if (rtc->irq_freq > rtc->max_user_freq && - !capable(CAP_SYS_RESOURCE)) + !capable(CAP_SYS_RESOURCE)) err = -EACCES; break; } @@ -362,7 +361,6 @@ static long rtc_dev_ioctl(struct file *file, case RTC_IRQP_SET: err = rtc_irq_set_freq(rtc, arg); break; - case RTC_IRQP_READ: err = put_user(rtc->irq_freq, (unsigned long __user *)uarg); break; @@ -390,8 +388,9 @@ static long rtc_dev_ioctl(struct file *file, err = ops->ioctl(rtc->dev.parent, cmd, arg); if (err == -ENOIOCTLCMD) err = -ENOTTY; - } else + } else { err = -ENOTTY; + } break; } @@ -400,9 +399,38 @@ done: return err; } +#ifdef CONFIG_COMPAT +#define RTC_IRQP_SET32 _IOW('p', 0x0c, __u32) +#define RTC_IRQP_READ32 _IOR('p', 0x0b, __u32) +#define RTC_EPOCH_SET32 _IOW('p', 0x0e, __u32) + +static long rtc_dev_compat_ioctl(struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct rtc_device *rtc = file->private_data; + void __user *uarg = compat_ptr(arg); + + switch (cmd) { + case RTC_IRQP_READ32: + return put_user(rtc->irq_freq, (__u32 __user *)uarg); + + case RTC_IRQP_SET32: + /* arg is a plain integer, not pointer */ + return rtc_dev_ioctl(file, RTC_IRQP_SET, arg); + + case RTC_EPOCH_SET32: + /* arg is a plain integer, not pointer */ + return rtc_dev_ioctl(file, RTC_EPOCH_SET, arg); + } + + return rtc_dev_ioctl(file, cmd, (unsigned long)uarg); +} +#endif + static int rtc_dev_fasync(int fd, struct file *file, int on) { struct rtc_device *rtc = file->private_data; + return fasync_helper(fd, file, on, &rtc->async_queue); } @@ -434,6 +462,9 @@ static const struct file_operations rtc_dev_fops = { .read = rtc_dev_read, .poll = rtc_dev_poll, .unlocked_ioctl = rtc_dev_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = rtc_dev_compat_ioctl, +#endif .open = rtc_dev_open, .release = rtc_dev_release, .fasync = rtc_dev_fasync, |
