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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-11-04 13:30:01 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-11-04 14:55:39 +0300 |
| commit | 2c3a3f44dc13a7c964e93385e1c1ca848656bed0 (patch) | |
| tree | dcc94f3bc020903a2aebfb4d56106623741525cb /certs | |
| parent | a44342acde304425fa70fd4f06c0e662a79ba5aa (diff) | |
| download | linux-2c3a3f44dc13a7c964e93385e1c1ca848656bed0.tar.xz | |
drm/i915: Fix pages pin counting around swizzle quirk
commit bc0629a76726 ("drm/i915: Track pages pinned due to swizzling
quirk") fixed one problem, but revealed a whole lot more. The root cause
of the pin count mismatch for the swizzle quirk (for L-shaped memory on
gen3/4) was that we were incrementing the pages_pin_count upon getting
the backing pages but then overwriting the pages_pin_count to set it to
1 afterwards. With a little bit of adjustment to satisfy the GEM_BUG_ON
sanitychecks, the fix is to replace the explicit atomic_set with an
atomic_inc.
v2: Consistently use atomics (not mix atomics and helpers) within the
lowlevel get_pages routines. This makes the atomic operations much
clearer.
Fixes: 1233e2db199d ("drm/i915: Move object backing storage manipulation")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161104103001.27643-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'certs')
0 files changed, 0 insertions, 0 deletions