This is a note to let you know that I've just added the patch titled
drm/i915: Fix the offset issue for the stolen GEM objects
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-fix-the-offset-issue-for-the-stolen-gem-objects.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ec14ba47791965d2c08e0a681ff44eacbf3c4553 Mon Sep 17 00:00:00 2001
From: Akash Goel <akash.goel@xxxxxxxxx>
Date: Mon, 13 Jan 2014 16:24:45 +0530
Subject: drm/i915: Fix the offset issue for the stolen GEM objects
From: Akash Goel <akash.goel@xxxxxxxxx>
commit ec14ba47791965d2c08e0a681ff44eacbf3c4553 upstream.
The 'offset' field of the 'scatterlist' structure was wrongly
programmed with the offset value from the base of stolen area,
whereas this field indicates the offset from where the interested
data starts within the first PAGE pointed to by 'scattterlist'
structure. As a result when a new GEM object allocated from stolen
area is mapped to GTT, it could lead to an overwrite of GTT entries
as the page count calculation will go wrong, refer the function
'sg_page_count'.
v2: Modified the commit message. (Chris)
Signed-off-by: Akash Goel <akash.goel@xxxxxxxxx>
Reviewed-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71908
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=69104
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_stolen.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -250,7 +250,7 @@ i915_pages_create_for_stolen(struct drm_
}
sg = st->sgl;
- sg->offset = offset;
+ sg->offset = 0;
sg->length = size;
sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset;
Patches currently in stable-queue which might be from akash.goel@xxxxxxxxx are
queue-3.12/drm-i915-fix-the-offset-issue-for-the-stolen-gem-objects.patch
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