Re: [PATCH 1/2] drm/i915/intel_i2c: handle zero-length reads

On Fri, 13 Apr 2012 19:47:53 +0800, Daniel Kurtz djkurtz@chromium.org wrote:

A common method of probing an i2c bus is trying to do a zero-length read. Handle this case by checking the length first waiting for data to be read.

This is actually important, since attempting a zero-length read 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@chromium.org

You earlier assuaged my fears that setting SW_READY without waiting would anger the hw, so

Reviewed-by: Chris Wilson chris@chris-wilson.co.uk -Chris