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| author | Dmitry Rogozhkin <dmitry.v.rogozhkin@intel.com> | 2012-10-03 17:15:26 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-10-04 10:33:42 +0200 |
| commit | e79e0fe380847493266fba557217e2773c61bd1b (patch) | |
| tree | 97e55deebc73b06739e28811f592e5ca6231065c /drivers | |
| parent | 2477367083b3eaa97f87993ab26627a02f350551 (diff) | |
| download | linux-e79e0fe380847493266fba557217e2773c61bd1b.tar.gz linux-e79e0fe380847493266fba557217e2773c61bd1b.tar.bz2 linux-e79e0fe380847493266fba557217e2773c61bd1b.zip | |
drm/i915: EBUSY status handling added to i915_gem_fault().
Subsequent threads returning EBUSY from vm_insert_pfn() was not handled
correctly. As a result concurrent access from new threads to
mmapped data caused SIGBUS.
Note that this fixes i-g-t/tests/gem_threaded_tiled_access.
Tested-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Dmitry Rogozhkin <dmitry.v.rogozhkin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 76bbb379d389..5fa3419461c5 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1400,6 +1400,11 @@ out: case 0: case -ERESTARTSYS: case -EINTR: + case -EBUSY: + /* + * EBUSY is ok: this just means that another thread + * already did the job. + */ return VM_FAULT_NOPAGE; case -ENOMEM: return VM_FAULT_OOM; |