tree 016122c1b20e51d32ddc2916c84a7a4a719e58bc
parent 755d22184f1e5015b040acee794542d9cf8a16c5
author Chris Wilson <chris@chris-wilson.co.uk> 1346788976 +0100
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1348143777 +0200

drm/i915: Pin backing pages for pread

By using the recently introduced pinning of pages, we can safely drop
the mutex in the knowledge that the pages are not going to disappear
beneath us, and so we can simplify the code for iterating over the pages.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>