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Dexuan Cui c554ab856b PM: hibernate: Freeze kernel threads in software_resume() 
commit 2351f8d295 upstream.

Currently the kernel threads are not frozen in software_resume(), so
between dpm_suspend_start(PMSG_QUIESCE) and resume_target_kernel(),
system_freezable_power_efficient_wq can still try to submit SCSI
commands and this can cause a panic since the low level SCSI driver
(e.g. hv_storvsc) has quiesced the SCSI adapter and can not accept
any SCSI commands: https://lkml.org/lkml/2020/4/10/47

At first I posted a fix (https://lkml.org/lkml/2020/4/21/1318) trying
to resolve the issue from hv_storvsc, but with the help of
Bart Van Assche, I realized it's better to fix software_resume(),
since this looks like a generic issue, not only pertaining to SCSI.

Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2020-05-06 08:15:09 +02:00
..
Kconfig pci-v5.3-changes 2019-07-15 20:44:49 -07:00
Makefile PM: Introduce an Energy Model management framework 2018-12-11 15:16:58 +01:00
autosleep.c PM / wakeup: Show wakeup sources stats in sysfs 2019-08-21 00:20:40 +02:00
console.c
…
energy_model.c sched/topology: Remove unused 'sd' parameter from arch_scale_cpu_capacity() 2019-06-24 19:23:39 +02:00
hibernate.c PM: hibernate: Freeze kernel threads in software_resume() 2020-05-06 08:15:09 +02:00
main.c PM: sleep: include <linux/pm_runtime.h> for pm_wq 2019-10-10 11:11:56 +02:00
power.h PM: hibernate: powerpc: Expose pfn_is_nosave() prototype 2019-06-14 10:48:56 +02:00
poweroff.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 248 2019-06-19 17:09:08 +02:00
process.c
…
qos.c PM: QoS: Invalidate frequency QoS requests after removal 2019-11-20 10:46:42 +01:00
snapshot.c PM: hibernate: fix crashes with init_on_free=1 2020-01-29 16:45:25 +01:00
suspend.c ACPI: PM: s2idle: Avoid possible race related to the EC GPE 2020-02-19 19:52:56 +01:00
suspend_test.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
swap.c kernel: power: swap: use kzalloc() instead of kmalloc() followed by memset() 2019-06-28 10:20:39 +02:00
user.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
wakelock.c PM / wakeup: Show wakeup sources stats in sysfs 2019-08-21 00:20:40 +02:00