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| author | Imre Deak | 2015-03-17 10:40:04 +0100 |
|---|---|---|
| committer | Daniel Vetter | 2015-03-20 11:48:21 +0100 |
| commit | 24be4e4650de2fc323ee0737f945ad366b6c11cc (patch) | |
| tree | 9ed8e204869a1ed7c2fcaac7860c074757a8cd78 /drivers/gpu/drm/i915/intel_display.c | |
| parent | drm/i915: factor out vlv_PLL_is_optimal (diff) | |
| download | kernel-qcow2-linux-24be4e4650de2fc323ee0737f945ad366b6c11cc.tar.gz kernel-qcow2-linux-24be4e4650de2fc323ee0737f945ad366b6c11cc.tar.xz kernel-qcow2-linux-24be4e4650de2fc323ee0737f945ad366b6c11cc.zip | |
drm/i915: check for div-by-zero in vlv_PLL_is_optimal
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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 | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 9dc9a85d0008..b0aa6a4784c4 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -786,6 +786,9 @@ static bool vlv_PLL_is_optimal(struct drm_device *dev, int target_freq, unsigned int best_error_ppm, unsigned int *error_ppm) { + if (WARN_ON_ONCE(!target_freq)) + return false; + *error_ppm = div_u64(1000000ULL * abs(target_freq - calculated_clock->dot), target_freq); |