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From: Armin Wolf <W_Armin@gmx.de>
To: "Rafael J. Wysocki" <rafael@kernel.org>, Len Brown <lenb@kernel.org>
Cc: "linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: [BUG] sbs module causes lockup upon suspend/shutdown
Date: Sat, 18 Feb 2023 14:58:15 +0100	[thread overview]
Message-ID: <362d19fc-85f6-4bc4-46c5-1933113aec4f@gmx.de> (raw)

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


                 reply	other threads:[~2023-02-18 13:58 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

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