Re: [PATCH 1/7 v6] drm/i915/intel_i2c: handle zero-length writes
From: Chris Wilson
Date: Wed Mar 28 2012 - 14:34:35 EST
On Thu, 29 Mar 2012 02:26:33 +0800, Daniel Kurtz <djkurtz@xxxxxxxxxxxx> wrote:
> A common method of probing an i2c bus is trying to do a zero-length write.
> Handle this case by checking the length first before decrementing it.
> This is actually important, since attempting a zero-length write is one
> of the ways that i2cdetect and i2c_new_probed_device detect whether
> there is device present on the bus with a given address.
> Signed-off-by: Daniel Kurtz <djkurtz@xxxxxxxxxxxx>
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Chris Wilson, Intel Open Source Technology Centre
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