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| author | Ville Syrjälä | 2013-09-24 20:26:21 +0200 |
|---|---|---|
| committer | Daniel Vetter | 2013-10-10 12:46:50 +0200 |
| commit | c686122c638838ce7113aeb22e4f1c50446de6eb (patch) | |
| tree | 75125c24589ef723484b11b2ed760a850db2ca91 /drivers/gpu/drm/i915/intel_display.c | |
| parent | drm/i915: Make vlv_find_best_dpll() ppm calculation safe (diff) | |
| download | kernel-qcow2-linux-c686122c638838ce7113aeb22e4f1c50446de6eb.tar.gz kernel-qcow2-linux-c686122c638838ce7113aeb22e4f1c50446de6eb.tar.xz kernel-qcow2-linux-c686122c638838ce7113aeb22e4f1c50446de6eb.zip | |
drm/i915: Don't underflow bestppm
We do 'bestppm - 10' in vlv_find_best_dpll() but never check whether
that might underflow. Add such a check.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -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 dc5077560c74..789e6ab8fb19 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -708,7 +708,7 @@ vlv_find_best_dpll(const intel_limit_t *limit, struct drm_crtc *crtc, bestppm = 0; flag = 1; } - if (ppm < bestppm - 10) { + if (bestppm >= 10 && ppm < bestppm - 10) { bestppm = ppm; flag = 1; } |