diff options
| author | Dmitry Rogozhkin <dmitry.v.rogozhkin@intel.com> | 2012-10-03 17:15:26 +0300 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-01-03 03:32:53 +0000 |
| commit | 750ebe7d20b661ab286380a819a83c18365648b3 (patch) | |
| tree | 76371492c0bd6e56170221da24d66d6d5aa80d80 /drivers/gpu/drm/i915 | |
| parent | 160fd2bef287f4b2b994925e79e7ef879090c6da (diff) | |
drm/i915: EBUSY status handling added to i915_gem_fault().
commit e79e0fe380847493266fba557217e2773c61bd1b upstream.
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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -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 dbe4dbe4647..5950ba35ba9 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1259,6 +1259,11 @@ 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; |