drm/i915: Handle vm_mmap error during I915_GEM_MMAP ioctl with WC set
authorJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Thu, 7 Feb 2019 08:54:54 +0000 (10:54 +0200)
committerJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Thu, 7 Feb 2019 12:10:36 +0000 (14:10 +0200)
commitebfb6977801da521d8d5d752d373a187e2a2b9b3
tree7e8b004060eb0c8dff3fcf7b5223b5a2d55d8aa0
parent5c4604e757ba9b193b09768d75a7d2105a5b883f
drm/i915: Handle vm_mmap error during I915_GEM_MMAP ioctl with WC set

Add err goto label and use it when VMA can't be established or changes
underneath.

v2:
- Dropping Fixes: as it's indeed impossible to race an object to the
  error address. (Chris)
v3:
- Use IS_ERR_VALUE (Chris)

Reported-by: Adam Zabrocki <adamza@microsoft.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Adam Zabrocki <adamza@microsoft.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> #v2
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190207085454.10598-2-joonas.lahtinen@linux.intel.com
drivers/gpu/drm/i915/i915_gem.c