linux-kernel - Re: [PATCH 6/7 v6] drm/i915/intel_i2c: reuse GMBUS2 value read in polling loop

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Message-ID: <1332960816_131195@CP5-2952>
Date:	Wed, 28 Mar 2012 19:53:24 +0100
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	Daniel Kurtz <djkurtz@...omium.org>,
	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
Cc:	Benson Leung <bleung@...omium.org>,
	Yufeng Shen <miletus@...omium.org>,
	Daniel Kurtz <djkurtz@...omium.org>
Subject: Re: [PATCH 6/7 v6] drm/i915/intel_i2c: reuse GMBUS2 value read in polling loop

On Thu, 29 Mar 2012 02:26:38 +0800, Daniel Kurtz <djkurtz@...omium.org> wrote:
> Save the GMBUS2 value read while polling for state changes, and then
> reuse this value when determining for which reason the loops were exited.
> This is a small optimization which saves a couple of bus accesses for
> memory mapped IO registers.
> 
> To avoid "assigning in if clause" checkpatch errors", use a ret variable
> to store the wait_for macro return value.
> 
> Signed-off-by: Daniel Kurtz <djkurtz@...omium.org>
Reviewed-by: Chris Wilson <chris@...is-wilson.co.uk>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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