diff options
| author | Alban Browaeys <prahal@yahoo.com> | 2012-02-24 17:12:45 +0000 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2012-02-24 09:36:25 -0800 |
| commit | aed3f09db39596e539f90b11a5016aea4d8442e1 (patch) | |
| tree | 62e3645dd8cc2be9f1fb4ca6a168f40d3c3c5898 /drivers/gpu/drm/i915 | |
| parent | c0e2ee1bc0cf82eec89e26b7afe7e4db0561b7d9 (diff) | |
drm/i915: Prevent a machine hang by checking crtc->active before loading lut
Before loading the lut (gamma), check the active state of intel_crtc,
otherwise at least on gen2 hang ensue.
This is reproducible in Xorg via:
xset dpms force off
then
xgamma -rgamma 2.0 # freeze.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=44505
Signed-off-by: Alban Browaeys <prahal@yahoo.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: stable@kernel.org
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 4871ba0dcc1..f851db7be2c 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6184,7 +6184,7 @@ void intel_crtc_load_lut(struct drm_crtc *crtc) int i; /* The clocks have to be on to load the palette. */ - if (!crtc->enabled) + if (!crtc->enabled || !intel_crtc->active) return; /* use legacy palette for Ironlake */ |