drm/i915: fix hibernation since i915 self-reclaim fixes

commit 985b823b919273fe1327d56d2196b4f92e5d0fae upstream.

Since commit 4bdadb9785696439c6e2b3efe34aa76df1149c83 ("drm/i915:
Selectively enable self-reclaim"), we've been passing GFP_MOVABLE to the
i915 page allocator where we weren't before due to some over-eager
removal of the page mapping gfp_flags games the code used to play.

This caused hibernate on Intel hardware to result in a lot of memory
corruptions on resume.  See for example

  http://bugzilla.kernel.org/show_bug.cgi?id=13811

Reported-by: Evengi Golov (in bugzilla)
Signed-off-by: Dave Airlie <airlied@redhat.com>
Tested-by: M. Vefa Bicakci <bicave@superonline.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 952c844713d50f6220cab92cc73d252d8bbea4e4..bf87c7fc15d4d872f30b777612a765db598f3460 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2262,7 +2262,7 @@ i915_gem_object_get_pages(struct drm_gem_object *obj,
        mapping = inode->i_mapping;
        for (i = 0; i < page_count; i++) {
                page = read_cache_page_gfp(mapping, i,
-                                          mapping_gfp_mask (mapping) |
+                                          GFP_HIGHUSER |
                                           __GFP_COLD |
                                           gfpmask);
                if (IS_ERR(page))