linux-kernel - Re: [PATCH 6/9] drm/i915/intel_i2c: return -ENXIO for device NAK

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Message-Id: <aefc95$3e4bn0@orsmga001.jf.intel.com>
Date:	Wed, 07 Mar 2012 12:12:29 +0000
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	Daniel Kurtz <djkurtz@...omium.org>,
	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>,
	Sameer Nanda <snanda@...omium.org>,
	Daniel Kurtz <djkurtz@...omium.org>
Subject: Re: [PATCH 6/9] drm/i915/intel_i2c: return -ENXIO for device NAK

On Wed,  7 Mar 2012 19:50:47 +0800, Daniel Kurtz <djkurtz@...omium.org> wrote:
> Return -ENXIO if a device NAKs a transaction.
> 
> Note: We should return -ETIMEDOUT, too if the transaction times out,
> however, that error path is currently handled by the 'bit-bang fallback'.
> 
> Signed-off-by: Daniel Kurtz <djkurtz@...omium.org>

Can you clarify what the rule is if an error is detected part-way
through a xfer?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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