This is a note to let you know that I've just added the patch titled
drm/radeon: add extra check in radeon_ttm_tt_unpin_userptr
to the 3.19-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-radeon-add-extra-check-in-radeon_ttm_tt_unpin_userptr.patch
and it can be found in the queue-3.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 863653fed0f449fb738295255cc834b271cfa088 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <[email protected]>
Date: Tue, 31 Mar 2015 17:36:57 +0200
Subject: drm/radeon: add extra check in radeon_ttm_tt_unpin_userptr
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From: =?UTF-8?q?Christian=20K=C3=B6nig?= <[email protected]>
commit 863653fed0f449fb738295255cc834b271cfa088 upstream.
We somehow try to free the SG table twice.
Bugs: https://bugs.freedesktop.org/show_bug.cgi?id=89734
Signed-off-by: Christian König <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/radeon/radeon_ttm.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -598,6 +598,10 @@ static void radeon_ttm_tt_unpin_userptr(
enum dma_data_direction direction = write ?
DMA_BIDIRECTIONAL : DMA_TO_DEVICE;
+ /* double check that we don't free the table twice */
+ if (!ttm->sg->sgl)
+ return;
+
/* free the sg table and pages again */
dma_unmap_sg(rdev->dev, ttm->sg->sgl, ttm->sg->nents, direction);
Patches currently in stable-queue which might be from [email protected]
are
queue-3.19/drm-radeon-fix-wait-in-radeon_mn_invalidate_range_start.patch
queue-3.19/drm-radeon-add-extra-check-in-radeon_ttm_tt_unpin_userptr.patch
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