blackbird-op-linux/drivers/hwtracing, branch master

coresight: etm4x: Fix unused function warning

2020-01-14T14:38:28+00:00

Some of the newly added code in the etm4x driver is inside of an #ifdef, and some other code is outside of it, leading to a harmless warning when CONFIG_CPU_PM is disabled: drivers/hwtracing/coresight/coresight-etm4x.c:68:13: error: 'etm4_os_lock' defined but not used [-Werror=unused-function] static void etm4_os_lock(struct etmv4_drvdata *drvdata) ^~~~~~~~~~~~ To avoid the warning and simplify the the #ifdef checks, use IS_ENABLED() instead, so the compiler can drop the unused functions without complaining. Fixes: f188b5e76aae ("coresight: etm4x: Save/restore state across CPU low power states") Signed-off-by: Arnd Bergmann [Fixed capital 'f' in title] Signed-off-by: Mathieu Poirier Link: https://lore.kernel.org/r/20191213223107.1484-2-mathieu.poirier@linaro.org Signed-off-by: Greg Kroah-Hartman

intel_th: msu: Fix window switching without windows

2019-12-17T14:45:59+00:00

Commit 6cac7866c2741 ("intel_th: msu: Add a sysfs attribute to trigger window switch") adds a NULL pointer dereference in the case when there are no windows allocated: > BUG: kernel NULL pointer dereference, address: 0000000000000000 > #PF: supervisor read access in kernel mode > #PF: error_code(0x0000) - not-present page > PGD 0 P4D 0 > Oops: 0000 1 SMP > CPU: 5 PID: 1110 Comm: bash Not tainted 5.5.0-rc1+ #1 > RIP: 0010:msc_win_switch+0xa/0x80 [intel_th_msu] > Call Trace: > ? win_switch_store+0x9b/0xc0 [intel_th_msu] > dev_attr_store+0x17/0x30 > sysfs_kf_write+0x3e/0x50 > kernfs_fop_write+0xda/0x1b0 > __vfs_write+0x1b/0x40 > vfs_write+0xb9/0x1a0 > ksys_write+0x67/0xe0 > __x64_sys_write+0x1a/0x20 > do_syscall_64+0x57/0x1d0 > entry_SYSCALL_64_after_hwframe+0x44/0xa9 Fix that by disallowing window switching with multiwindow buffers without windows. Signed-off-by: Alexander Shishkin Fixes: 6cac7866c274 ("intel_th: msu: Add a sysfs attribute to trigger window switch") Reviewed-by: Andy Shevchenko Reported-by: Ammy Yi Tested-by: Ammy Yi Cc: stable@vger.kernel.org # v5.2+ Link: https://lore.kernel.org/r/20191217115527.74383-5-alexander.shishkin@linux.intel.com Signed-off-by: Greg Kroah-Hartman

intel_th: Fix freeing IRQs

2019-12-17T14:45:58+00:00

Commit aac8da65174a ("intel_th: msu: Start handling IRQs") implicitly relies on the use of devm_request_irq() to subsequently free the irqs on device removal, but in case of the pci_free_irq_vectors() API, the handlers need to be freed before it is called. Therefore, at the moment the driver's remove path trips a BUG_ON(irq_has_action()): > kernel BUG at drivers/pci/msi.c:375! > invalid opcode: 0000 1 SMP > CPU: 2 PID: 818 Comm: rmmod Not tainted 5.5.0-rc1+ #1 > RIP: 0010:free_msi_irqs+0x67/0x1c0 > pci_disable_msi+0x116/0x150 > pci_free_irq_vectors+0x1b/0x20 > intel_th_pci_remove+0x22/0x30 [intel_th_pci] > pci_device_remove+0x3e/0xb0 > device_release_driver_internal+0xf0/0x1c0 > driver_detach+0x4c/0x8f > bus_remove_driver+0x5c/0xd0 > driver_unregister+0x31/0x50 > pci_unregister_driver+0x40/0x90 > intel_th_pci_driver_exit+0x10/0xad6 [intel_th_pci] > __x64_sys_delete_module+0x147/0x290 > ? exit_to_usermode_loop+0xd7/0x120 > do_syscall_64+0x57/0x1b0 > entry_SYSCALL_64_after_hwframe+0x44/0xa9 Fix this by explicitly freeing irqs before freeing the vectors. We keep using the devm_* variants because they are still useful in early error paths. Signed-off-by: Alexander Shishkin Reviewed-by: Andy Shevchenko Fixes: aac8da65174a ("intel_th: msu: Start handling IRQs") Reported-by: Ammy Yi Tested-by: Ammy Yi Cc: stable@vger.kernel.org # v5.2+ Link: https://lore.kernel.org/r/20191217115527.74383-4-alexander.shishkin@linux.intel.com Signed-off-by: Greg Kroah-Hartman

intel_th: pci: Add Elkhart Lake SOC support

2019-12-17T14:45:57+00:00

This adds support for Intel Trace Hub in Elkhart Lake. Signed-off-by: Alexander Shishkin Reviewed-by: Andy Shevchenko Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20191217115527.74383-3-alexander.shishkin@linux.intel.com Signed-off-by: Greg Kroah-Hartman

intel_th: pci: Add Comet Lake PCH-V support

2019-12-17T14:45:57+00:00

This adds Intel(R) Trace Hub PCI ID for Comet Lake PCH-V. Signed-off-by: Alexander Shishkin Reviewed-by: Andy Shevchenko Cc: Link: https://lore.kernel.org/r/20191217115527.74383-2-alexander.shishkin@linux.intel.com Signed-off-by: Greg Kroah-Hartman

Merge tag 'compat-ioctl-5.5' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground

2019-12-01T21:46:15+00:00

Pull removal of most of fs/compat_ioctl.c from Arnd Bergmann: "As part of the cleanup of some remaining y2038 issues, I came to fs/compat_ioctl.c, which still has a couple of commands that need support for time64_t. In completely unrelated work, I spent time on cleaning up parts of this file in the past, moving things out into drivers instead. After Al Viro reviewed an earlier version of this series and did a lot more of that cleanup, I decided to try to completely eliminate the rest of it and move it all into drivers. This series incorporates some of Al's work and many patches of my own, but in the end stops short of actually removing the last part, which is the scsi ioctl handlers. I have patches for those as well, but they need more testing or possibly a rewrite" * tag 'compat-ioctl-5.5' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground: (42 commits) scsi: sd: enable compat ioctls for sed-opal pktcdvd: add compat_ioctl handler compat_ioctl: move SG_GET_REQUEST_TABLE handling compat_ioctl: ppp: move simple commands into ppp_generic.c compat_ioctl: handle PPPIOCGIDLE for 64-bit time_t compat_ioctl: move PPPIOCSCOMPRESS to ppp_generic compat_ioctl: unify copy-in of ppp filters tty: handle compat PPP ioctls compat_ioctl: move SIOCOUTQ out of compat_ioctl.c compat_ioctl: handle SIOCOUTQNSD af_unix: add compat_ioctl support compat_ioctl: reimplement SG_IO handling compat_ioctl: move WDIOC handling into wdt drivers fs: compat_ioctl: move FITRIM emulation into file systems gfs2: add compat_ioctl support compat_ioctl: remove unused convert_in_user macro compat_ioctl: remove last RAID handling code compat_ioctl: remove /dev/raw ioctl translation compat_ioctl: remove PCI ioctl translation compat_ioctl: remove joystick ioctl translation ...

intel_th: pci: Add Tiger Lake CPU support

2019-11-20T13:37:30+00:00

This adds support for the Trace Hub in Tiger Lake CPU. Signed-off-by: Alexander Shishkin Reviewed-by: Andy Shevchenko Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20191120130806.44028-4-alexander.shishkin@linux.intel.com Signed-off-by: Greg Kroah-Hartman

intel_th: pci: Add Ice Lake CPU support

2019-11-20T13:37:30+00:00

This adds support for the Trace Hub in Ice Lake CPU. Signed-off-by: Alexander Shishkin Reviewed-by: Andy Shevchenko Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20191120130806.44028-3-alexander.shishkin@linux.intel.com Signed-off-by: Greg Kroah-Hartman

intel_th: Fix a double put_device() in error path

2019-11-20T13:37:29+00:00

Commit a753bfcfdb1f ("intel_th: Make the switch allocate its subdevices") factored out intel_th_subdevice_alloc() from intel_th_populate(), but got the error path wrong, resulting in two instances of a double put_device() on a freshly initialized, but not 'added' device. Fix this by only doing one put_device() in the error path. Signed-off-by: Alexander Shishkin Fixes: a753bfcfdb1f ("intel_th: Make the switch allocate its subdevices") Reported-by: Wen Yang Reviewed-by: Andy Shevchenko Cc: stable@vger.kernel.org # v4.14+ Link: https://lore.kernel.org/r/20191120130806.44028-2-alexander.shishkin@linux.intel.com Signed-off-by: Greg Kroah-Hartman

coresight: replicator: Fix missing spin_lock_init()

2019-11-19T18:18:15+00:00

The driver allocates the spinlock but not initialize it. Use spin_lock_init() on it to initialize it correctly. This is detected by Coccinelle semantic patch. Signed-off-by: Wei Yongjun Tested-by: Yabin Cui Signed-off-by: Mathieu Poirier Link: https://lore.kernel.org/r/20191118185207.30441-3-mathieu.poirier@linaro.org Signed-off-by: Greg Kroah-Hartman