linux-kernel - Re: [PATCH] drm/i915: Fix race condition in accessing GMBUS

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Message-ID: <20120214094743.GB4097@phenom.ffwll.local>
Date:	Tue, 14 Feb 2012 10:47:43 +0100
From:	Daniel Vetter <daniel@...ll.ch>
To:	Yufeng Shen <miletus@...omium.org>
Cc:	Daniel Vetter <daniel@...ll.ch>, Keith Packard <keithp@...thp.com>,
	David Airlie <airlied@...ux.ie>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Eugeni Dodonov <eugeni.dodonov@...el.com>,
	Ben Widawsky <ben@...dawsk.net>
Subject: Re: [PATCH] drm/i915: Fix race condition in accessing GMBUS

On Mon, Feb 13, 2012 at 05:36:54PM -0500, Yufeng Shen wrote:
> Moved gmbus_mutex below intel_gmbus and added comments.
> Rebased to drm-intel-next-queued.
> 
> ----------------------------------------------------------------
> 
> GMBUS has several ports and each has it's own corresponding
> I2C adpater. When multiple I2C adapters call gmbus_xfer() at
> the same time there is a race condition in using the underlying
> GMBUS controller. Fixing this by adding a mutex lock when calling
> gmbus_xfer().
> 
> Signed-off-by: Yufeng Shen <miletus@...omium.org>

Queued for -next (with some slight modifications in the comments), thanks
for the patch.
-Daniel
-- 
Daniel Vetter
Mail: daniel@...ll.ch
Mobile: +41 (0)79 365 57 48
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