linux-kernel - Re: [PATCH] dell-rbtn: Ignore ACPI notifications if device is suspended

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Message-ID: <20151123144858.GE24147@pali>
Date:	Mon, 23 Nov 2015 15:48:58 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Gabriele Mazzotta <gabriele.mzt@...il.com>
Cc:	dvhart@...radead.org, platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Andrei Borzenkov <arvidjaar@...il.com>
Subject: Re: [PATCH] dell-rbtn: Ignore ACPI notifications if device is
 suspended

On Saturday 21 November 2015 15:16:15 Gabriele Mazzotta wrote:
> Some BIOSes unconditionally send an ACPI notification to RBTN when the
> system is resuming from suspend. This makes dell-rbtn send an input
> event to userspace as if a function key was pressed. Prevent this by
> ignoring all the notifications received while the device is suspended.
> 
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=106031
> Signed-off-by: Gabriele Mazzotta <gabriele.mzt@...il.com>

Andrei Borzenkov (CCed) tested this patch and patch does not fix bug.
Probably there is race condition and ACPI event is sent *after* function
rbtn_resume is called.

-- 
Pali Rohár
pali.rohar@...il.com
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