This is a note to let you know that I've just added the patch titled
drm/radeon: use post-decrement in error handling
to the 4.4-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-use-post-decrement-in-error-handling.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bc3f5d8c4ca01555820617eb3b6c0857e4df710d Mon Sep 17 00:00:00 2001
From: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Date: Mon, 15 Feb 2016 19:41:47 +0100
Subject: drm/radeon: use post-decrement in error handling
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From: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
commit bc3f5d8c4ca01555820617eb3b6c0857e4df710d upstream.
We need to use post-decrement to get the pci_map_page undone also for
i==0, and to avoid some very unpleasant behaviour if pci_map_page
failed already at i==0.
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_ttm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -758,7 +758,7 @@ static int radeon_ttm_tt_populate(struct
0, PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(rdev->pdev, gtt->ttm.dma_address[i])) {
- while (--i) {
+ while (i--) {
pci_unmap_page(rdev->pdev, gtt->ttm.dma_address[i],
PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
gtt->ttm.dma_address[i] = 0;
Patches currently in stable-queue which might be from linux@xxxxxxxxxxxxxxxxxx are
queue-4.4/drm-amdgpu-use-post-decrement-in-error-handling.patch
queue-4.4/drm-radeon-use-post-decrement-in-error-handling.patch
queue-4.4/drm-i915-fix-error-path-in-intel_setup_gmbus.patch
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