AuxXxilium/linux_dsm_epyc7002
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c57c0ad4a3
linux_dsm_epyc7002/drivers/acpi
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Steven Rostedt c57c0ad4a3 ACPICA: Convert acpi_gbl_hardware lock back to an acpi_raw_spinlock 
We hit the following bug with -RT:

|BUG: scheduling while atomic: swapper/7/0/0x00000002
|Pid: 0, comm: swapper/7 Not tainted 3.6.11-rt28.19.el6rt.x86_64.debug #1
|Call Trace:
|  rt_spin_lock+0x16/0x40
|  __schedule_bug+0x67/0x90
|  __schedule+0x793/0x7a0
|  acpi_os_acquire_lock+0x1f/0x23
|  acpi_write_bit_register+0x33/0xb0
|  rt_spin_lock_slowlock+0xe5/0x2f0
|  acpi_idle_enter_bm+0x8a/0x28e
…
As the acpi code disables interrupts in acpi_idle_enter_bm, and calls
code that grabs the acpi lock, it causes issues as the lock is currently
in RT a sleeping lock.

The lock was converted from a raw to a sleeping lock due to some
previous issues, and tests that showed it didn't seem to matter.
Unfortunately, it did matter for one of our boxes.

This patch converts the lock back to a raw lock. I've run this code on a
few of my own machines, one being my laptop that uses the acpi quite
extensively. I've been able to suspend and resume without issues.

[ tglx: Made the change exclusive for acpi_gbl_hardware_lock ]

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1360765565.23152.5.camel@gandalf.local.home
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[bigeasy: shorten the backtrace, use the type acpi_raw_spinlock incl.
 accessor]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-10 17:18:45 +02:00
..
acpica ACPICA: Convert acpi_gbl_hardware lock back to an acpi_raw_spinlock 2018-05-10 17:18:45 +02:00
apei Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2018-01-30 14:18:52 -08:00
arm64 IOMMU Updates for Linux v4.17 2018-04-11 18:50:41 -07:00
dptf License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nfit libnvdimm for 4.17 2018-04-10 10:25:57 -07:00
pmic ACPI / PMIC: Replace license boilerplate with SPDX license identifier 2018-02-22 23:14:58 +01:00
x86 ACPI / x86: Extend KIOX000A quirk to cover all affected BIOS versions 2017-10-21 13:24:53 +02:00
ac.c battery: Add the battery hooking API 2018-02-21 23:27:13 +01:00
acpi_amba.c
acpi_apd.c ACPI / APD: Add clock frequency for ThunderX2 I2C controller 2017-10-17 23:52:54 +02:00
acpi_cmos_rtc.c
acpi_configfs.c ACPI: configfs: make config_item_type const 2017-10-19 16:15:29 +02:00
acpi_dbg.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
acpi_extlog.c
acpi_ipmi.c
acpi_lpat.c ACPI / lpat: Fix typos in comments and kerneldoc style 2017-07-24 22:52:00 +02:00
acpi_lpit.c ACPI / LPIT: Export lpit_read_residency_count_address() 2018-02-04 15:55:52 +02:00
acpi_lpss.c ACPI / LPSS: Do not instiate platform_dev for devs without MMIO resources 2018-01-15 17:45:25 +01:00
acpi_memhotplug.c
acpi_pad.c ACPI: acpi_pad: Fix memory leak in power saving threads 2018-03-30 12:04:58 +02:00
acpi_platform.c
acpi_pnp.c
acpi_processor.c ACPI: Mark expected switch fall-throughs 2017-11-09 00:55:16 +01:00
acpi_tad.c ACPI: Add Time and Alarm Device (TAD) driver 2018-03-20 10:36:04 +01:00
acpi_video.c ACPI / video: Only default only_lcd to true on Win8-ready _desktops_ 2018-04-24 22:42:35 +02:00
acpi_watchdog.c ACPI / watchdog: Prefer iTCO_wdt on Lenovo Z50-70 2018-04-24 11:12:59 +02:00
battery.c Merge branches 'acpi-battery', 'acpi-doc' and 'acpi-pmic' 2018-04-02 10:58:13 +02:00
bgrt.c ACPI: BGRT: constify attribute_group structures 2017-07-04 22:15:20 +02:00
blacklist.c dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
bus.c ACPICA: Rename a global for clarity, no functional change 2018-03-18 18:52:00 +01:00
button.c ACPI / button: make module loadable when booted in non-ACPI mode 2018-04-24 12:47:34 +02:00
cm_sbs.c
container.c
cppc_acpi.c ACPI / CPPC: Update all pr_(debug/err) messages to log the susbspace id 2018-02-22 22:54:00 +01:00
custom_method.c treewide: Align function definition open/close braces 2018-03-26 11:13:09 +02:00
debugfs.c
device_pm.c ACPI / PM: Allow deeper wakeup power states with no _SxD nor _SxW 2018-03-20 10:27:09 +01:00
device_sysfs.c treewide: Use DEVICE_ATTR_RO 2018-01-09 16:34:34 +01:00
dock.c ACPI: Mark expected switch fall-throughs 2017-11-09 00:55:16 +01:00
ec_sys.c ACPI: EC: Fix debugfs_create_*() usage 2018-01-04 13:54:51 +01:00
ec.c ACPI / EC: Restore polling during noirq suspend/resume phases 2018-02-12 10:29:31 +01:00
event.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
evged.c ACPI: GED: unregister interrupts during shutdown 2017-12-16 03:05:37 +01:00
fan.c treewide: Align function definition open/close braces 2018-03-26 11:13:09 +02:00
glue.c
hed.c
internal.h ACPI: EC: Fix debugfs_create_*() usage 2018-01-04 13:54:51 +01:00
ioapic.c
irq.c ACPI / irq: Fix return code of acpi_gsi_to_irq() 2017-07-12 13:11:49 +02:00
Kconfig Merge branches 'acpi-osi', 'acpi-scan', 'acpi-tad', 'acpi-video' and 'acpi-misc' 2018-04-02 10:59:01 +02:00
Makefile ACPI: Add Time and Alarm Device (TAD) driver 2018-03-20 10:36:04 +01:00
numa.c acpi, numa: fix pxm to online numa node associations 2018-03-15 19:49:14 -07:00
nvs.c
osi.c ACPI / OSI: Add OEM _OSI strings to disable NVidia RTD3 2018-03-18 23:42:33 +01:00
osl.c acpi: Introduce acpi_arch_get_root_pointer() for getting rsdp address 2018-02-26 08:43:20 +01:00
pci_irq.c
pci_link.c ACPI / PCI: pci_link: Allow the absence of _PRS and change log level 2018-02-27 17:15:39 +01:00
pci_mcfg.c
pci_root.c Merge branch 'pci/portdrv' 2018-04-04 13:27:58 -05:00
pci_slot.c dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
power.c ACPI / power: constify attribute_group structures 2017-07-04 22:15:14 +02:00
proc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
processor_core.c
processor_driver.c ACPI: processor: use dev_dbg() instead of dev_warn() when CPPC probe failed 2017-07-27 01:51:06 +02:00
processor_idle.c More ACPI updates for v4.16-rc1 2018-02-09 09:44:25 -08:00
processor_pdc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
processor_perflib.c xen/acpi: upload _PSD info for non Dom0 CPUs too 2018-03-21 08:29:13 -04:00
processor_thermal.c
processor_throttling.c
property.c device property: Constify device_get_match_data() 2018-02-12 10:41:11 +01:00
reboot.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
resource.c ACPI: Mark expected switch fall-throughs 2017-11-09 00:55:16 +01:00
sbs.c battery: Add the battery hooking API 2018-02-21 23:27:13 +01:00
sbshc.c ACPI: sbshc: remove raw pointer from printk() message 2018-02-08 09:50:08 +01:00
sbshc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
scan.c ACPI / scan: Initialize watchdog before PNP 2018-04-23 08:56:38 +02:00
sleep.c ACPI / PM: Blacklist Low Power S0 Idle _DSM for ThinkPad X1 Tablet(2016) 2018-04-23 08:53:17 +02:00
sleep.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spcr.c ACPI: SPCR: Mark expected switch fall-through in acpi_parse_spcr 2018-02-12 10:31:26 +01:00
sysfs.c ACPI: sysfs: Make ACPI GPE mask kernel parameter cover all GPEs 2017-12-13 01:11:33 +01:00
tables.c ACPI: add NFIT and HMAT to the initrd override list 2018-02-22 22:46:35 +01:00
thermal.c dmi: Mark all struct dmi_system_id instances const 2017-09-14 11:59:30 +02:00
utils.c ACPI: utils: Introduce acpi_dev_get_first_match_name() 2018-01-10 00:41:43 +01:00
video_detect.c ACPI / video: Add quirk to force acpi-video backlight on Samsung 670Z5E 2018-03-20 10:38:17 +01:00
wakeup.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00