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| author | Matt Roper <matthew.d.roper@intel.com> | 2015-12-03 11:37:40 -0800 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2016-01-06 11:35:29 +0100 |
| commit | 151268821e6f08956b28b6ff90fae187a5b230b8 (patch) | |
| tree | f337a00ef44c248b8d700bf28c8dea1c4846718e /tools/perf/scripts/python/bin/stackcollapse-record | |
| parent | ee91a15972cc70efa4d17b4bbdb61ff314528110 (diff) | |
| download | linux-151268821e6f08956b28b6ff90fae187a5b230b8.tar.gz linux-151268821e6f08956b28b6ff90fae187a5b230b8.zip | |
drm/i915: Add extra paranoia to ILK watermark calculations
Our low-level watermark calculation functions don't get called when the
CRTC is disabled or the relevant plane is invisible, so they should
never see a zero htotal or zero bpp. However add some checks to ensure
this is true so that we don't wind up dividing by zero if we make a
mistake elsewhere in the driver (which the atomic watermark series has
revealed we might be).
References: http://lists.freedesktop.org/archives/intel-gfx/2015-October/077370.html
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1449171462-30763-6-git-send-email-matthew.d.roper@intel.com
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-record')
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