linux-kernel - Re: [PATCH] HID: rmi: do not fetch more than 16 bytes in a query

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Message-ID: <alpine.LNX.2.00.1405131643330.16459@pobox.suse.cz>
Date:	Tue, 13 May 2014 16:44:28 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Benjamin Tissoires <benjamin.tissoires@...hat.com>
cc:	Andrew Duggan <aduggan@...aptics.com>,
	Christopher Heiny <cheiny@...aptics.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HID: rmi: do not fetch more than 16 bytes in a query

On Thu, 24 Apr 2014, Benjamin Tissoires wrote:

> A firmware bug is present on the XPS Haswell edition which silently
> split the request in two responses when the caller ask for a read of
> more than 16 bytes.
> The FW sends the first 16 then the 4 next, but it says that it answered
> the 20 bytes in the first report.
> 
> This occurs only on the retrieving of the min/max of X and Y of the F11
> function.
> We only use the first 10 bytes of the Ctrl register, so we can get only
> those 10 bytes to prevent the bug from happening.
> 
> Resolves:
> https://bugzilla.redhat.com/show_bug.cgi?id=1090161
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>

Applied, thanks.

-- 
Jiri Kosina
SUSE Labs
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