drm/i915: Treat crtc->mode.clock == 0 as disabled
Prevent a divide-by-zero by consistently treating an 'active' CRTC
without a mode set as actually disabled.
This looks to have been first introduced with
commit 24929352481f085c5f85d4d4cbc919ddf106d381
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Mon Jul 2 20:28:59 2012 +0200
drm/i915: read out the modeset hw state at load and resume time
but then combined with
commit b0a2658acb5bf9ca86b4aab011b7106de3af0add
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Tue Dec 18 09:37:54 2012 +0100
drm/i915: don't disable disconnected outputs
it finally started oopsing.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reported-and-tested-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
1 file changed