WSL2-Linux-Kernel/drivers/base
Tony Lindgren c064b7c1d2 PM / wakeirq: Fix unbalanced IRQ enable for wakeirq
[ Upstream commit 69728051f5 ]

If a device is runtime PM suspended when we enter suspend and has
a dedicated wake IRQ, we can get the following warning:

WARNING: CPU: 0 PID: 108 at kernel/irq/manage.c:526 enable_irq+0x40/0x94
[  102.087860] Unbalanced enable for IRQ 147
...
(enable_irq) from [<c06117a8>] (dev_pm_arm_wake_irq+0x4c/0x60)
(dev_pm_arm_wake_irq) from [<c0618360>]
 (device_wakeup_arm_wake_irqs+0x58/0x9c)
(device_wakeup_arm_wake_irqs) from [<c0615948>]
(dpm_suspend_noirq+0x10/0x48)
(dpm_suspend_noirq) from [<c01ac7ac>]
(suspend_devices_and_enter+0x30c/0xf14)
(suspend_devices_and_enter) from [<c01adf20>]
(enter_state+0xad4/0xbd8)
(enter_state) from [<c01ad3ec>] (pm_suspend+0x38/0x98)
(pm_suspend) from [<c01ab3e8>] (state_store+0x68/0xc8)

This is because the dedicated wake IRQ for the device may have been
already enabled earlier by dev_pm_enable_wake_irq_check().  Fix the
issue by checking for runtime PM suspended status.

This issue can be easily reproduced by setting serial console log level
to zero, letting the serial console idle, and suspend the system from
an ssh terminal.  On resume, dmesg will have the warning above.

The reason why I have not run into this issue earlier has been that I
typically run my PM test cases from on a serial console instead over ssh.

Fixes: c843455975 (PM / wakeirq: Enable dedicated wakeirq for suspend)
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-04-26 11:02:20 +02:00
..
power PM / wakeirq: Fix unbalanced IRQ enable for wakeirq 2018-04-26 11:02:20 +02:00
regmap regmap: Fix reversed bounds check in regmap_raw_write() 2018-04-24 09:36:25 +02:00
test License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig dma-buf/fence: Fix lock inversion within dma-fence-array 2018-03-19 08:42:47 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
arch_topology.c Revert "base: arch_topology: fix section mismatch build warnings" 2018-04-08 14:26:32 +02:00
attribute_container.c
base.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bus.c driver core: bus: Fix a potential double free 2017-08-31 18:57:30 +02:00
cacheinfo.c drivers: base: cacheinfo: fix cache type for non-architected system cache 2018-01-02 20:31:16 +01:00
class.c
component.c
container.c
core.c PM / runtime: Update links_count also if !CONFIG_SRCU 2018-02-22 15:42:20 +01:00
cpu.c sysfs/cpu: Add vulnerability folder 2018-01-17 09:45:27 +01:00
dd.c initcall_debug: add deferred probe times 2017-08-03 17:48:49 -07:00
devcoredump.c
devres.c
devtmpfs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dma-coherent.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dma-contiguous.c
dma-mapping.c dma-coherent: remove the DMA_MEMORY_MAP and DMA_MEMORY_IO flags 2017-09-01 11:59:17 +02:00
driver.c
firmware.c
firmware_class.c Revert "firmware: add sanity check on shutdown/suspend" 2017-09-10 21:19:06 -07:00
hypervisor.c
init.c
isa.c isa: Prevent NULL dereference in isa_bus driver callbacks 2017-12-14 09:52:51 +01:00
map.c
memory.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
module.c
node.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pinctrl.c
platform-msi.c
platform.c driver core: platform: Don't read past the end of "driver_override" buffer 2017-09-18 17:16:47 +02:00
property.c ACPI: properties: Align return codes of __acpi_node_get_property_reference() 2017-10-11 21:15:44 +02:00
soc.c
syscore.c
topology.c base: topology: constify attribute_group structures. 2017-08-28 17:49:22 +02:00
transport_class.c