diff options
| author | Hai Lan <hai.lan@intel.com> | 2012-02-15 19:07:02 +0800 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2012-02-23 08:56:40 -0800 |
| commit | 4e9bb47bd29e02f2daaa7bdb2a8ddf977bf76f06 (patch) | |
| tree | a6067cdb859c1baee586136bbb43c7c822a66b79 /drivers/gpu | |
| parent | 5ca0c34ae28344b6b4ca3036bc82f89c8db16a59 (diff) | |
drm/i915: fix a sprite watermark computation to avoid divide by zero if xpos<0
When setting overlay position with x<0, it will divide 0 and make drm
driver crash.
Signed-off-by: Hai Lan <hai.lan@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index f3afec2854d..e654f32de19 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4680,8 +4680,17 @@ sandybridge_compute_sprite_srwm(struct drm_device *dev, int plane, crtc = intel_get_crtc_for_plane(dev, plane); clock = crtc->mode.clock; + if (!clock) { + *sprite_wm = 0; + return false; + } line_time_us = (sprite_width * 1000) / clock; + if (!line_time_us) { + *sprite_wm = 0; + return false; + } + line_count = (latency_ns / line_time_us + 1000) / 1000; line_size = sprite_width * pixel_size; |