[PATCH 1/8 v7] drm/i915/intel_i2c: handle zero-length writes

Chris Wilson chris at chris-wilson.co.uk
Tue Apr 3 15:54:18 PDT 2012

On Fri, 30 Mar 2012 19:46:36 +0800, Daniel Kurtz <djkurtz at chromium.org> 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 at chromium.org>

Having done a good job with handling zero length writes, can I tempt to
submit a similar fix for zero length reads? ;)

Chris Wilson, Intel Open Source Technology Centre

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