system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-10-11 13:55:09 +00:00
Code Issues Packages Projects Releases Wiki Activity

drm/i915: EBUSY status handling added to i915_gem_fault().

Browse source 
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>
This commit is contained in:
Dmitry Rogozhkin 2012-10-03 17:15:26 +03:00 committed by Daniel Vetter
parent 2477367083
commit e79e0fe380
1 changed files with 5 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
drivers/gpu/drm/i915/i915_gem.c
View file

@ -1400,6 +1400,11 @@ int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
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;