No need to bisect, the error message was introduced by Oscar in
commit 38cc46d73ed99dd7002f1406002e52d7975d16cc Author: Oscar Mateo <email address hidden> Date: Mon Jun 16 16:10:59 2014 +0100
drm/i915/bdw: Ack interrupts before handling them (GEN8)
And for those reason bit 23 of master ctl is set and the SDE IIR is 0.
No need to bisect, the error message was introduced by Oscar in
commit 38cc46d73ed99dd 7002f1406002e52 d7975d16cc
Author: Oscar Mateo <email address hidden>
Date: Mon Jun 16 16:10:59 2014 +0100
drm/i915/bdw: Ack interrupts before handling them (GEN8)
And for those reason bit 23 of master ctl is set and the SDE IIR is 0.