* [BUG] sbs module causes lockup upon suspend/shutdown
@ 2023-02-18 13:58 Armin Wolf
0 siblings, 0 replies; only message in thread
From: Armin Wolf @ 2023-02-18 13:58 UTC (permalink / raw)
To: Rafael J. Wysocki, Len Brown; +Cc: linux-acpi, linux-kernel
Hello,
on my Travelmate 4002WLMI, the sbs module causes a lockup upon suspend/shutdown when loaded.
Additionally, a kernel oops occurs when unloading the sbs module with "modprobe -r sbs", but
not with "rmmod sbs".
While i was able to fix the oops on module removal (a race condition similar to 757c968c4423,
but now inside the ACPI EC driver), i was unable to find the cause for the lockup.
I did however find out that the lockup does not occur when i reset the EC SMBus alert flag
before calling the handler function, to i suppose the issue lies inside the sbs alert callback
(maybe similar to add68d6aa9e2).
I created a bug report (https://bugzilla.kernel.org/show_bug.cgi?id=217041) with more information
attached, such as dmesg logs. Any ideas on what causes the lockup?
Armin Wolf
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2023-02-18 13:58 [BUG] sbs module causes lockup upon suspend/shutdown Armin Wolf
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