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authorTvrtko Ursulin <tvrtko.ursulin@intel.com>2017-10-17 16:09:08 +0100
committerTvrtko Ursulin <tvrtko.ursulin@intel.com>2017-10-18 09:25:39 +0100
commitcb8d50dfb341e9615c8d203a3e6513dae9ff901d (patch)
tree0c1d9aa4c26c37fed29ce5e98030105b2742c2ce /include
parent930a784d02339be437fec07b3bb7213bde0ed53b (diff)
drm/i915: Fixup userptr mmu notifier registration error handling
Avoid dereferencing the error pointer and also avoid returning NULL from i915_mmu_notifier_find since the callers do not expect that. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Fixes: 7741b547b6e0 ("drm/i915: Preallocate our mmu notifier workequeu to unbreak cpu hotplug deadlock") Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20171017150908.12840-1-tvrtko.ursulin@linux.intel.com
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