John Baldwin 544f167747 t seems certain Intel GPUs use GPIO bitbanging over a child device
instead of GMBUS access for I2C transfers.  The GMBUS driver falls back
to this mode when a transfer times out.  However, the first transfer to
timeout was sending the request back to itself resulting in an panic due
to recursing on a lock.  Fix it to forward the request on to the proper
device.  This appears to have been accidentally changed in r277487.

Reported by:	Joe Maloney <jmaloney@pcbsd.org>
Reviewed by:	adrian, dumbbell, imp
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D4599
2015-12-17 20:33:20 +00:00
..
2015-08-26 21:35:16 +00:00