79985eee84
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. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=48269 Signed-off-by: Daniel Kurtz <djkurtz@chromium.org> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch> |
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