From: Dmitry Rogozhkin <dmitry.v.rogozhkin@intel.com>
Date: Wed, 3 Oct 2012 14:15:26 +0000 (+0300)
Subject: drm/i915: EBUSY status handling added to i915_gem_fault().
X-Git-Tag: v3.2.36~146
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=750ebe7d20b661ab286380a819a83c18365648b3;p=pandora-kernel.git

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>
---

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