This is a note to let you know that I've just added the patch titled
drm/radeon: fix vm page table block size calculation
to the 3.17-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-fix-vm-page-table-block-size-calculation.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8e66e134e20b936179ea1535dd4ed19ec4f99dba Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@xxxxxxx>
Date: Wed, 15 Oct 2014 17:20:55 -0400
Subject: drm/radeon: fix vm page table block size calculation
From: Alex Deucher <alexander.deucher@xxxxxxx>
commit 8e66e134e20b936179ea1535dd4ed19ec4f99dba upstream.
The page offset is 12 bits. For example if we have an
8 GB VM, we'd need 33 bits. The number of bits needed
for PD + PT is 21 (33 - 12 or log2(8) + 18), not 20
(log2(8) + 17).
Noticed by Alexey during code review.
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_device.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -1130,7 +1130,7 @@ static void radeon_check_arguments(struc
if (radeon_vm_block_size == -1) {
/* Total bits covered by PD + PTs */
- unsigned bits = ilog2(radeon_vm_size) + 17;
+ unsigned bits = ilog2(radeon_vm_size) + 18;
/* Make sure the PD is 4K in size up to 8GB address space.
Above that split equal between PD and PTs */
Patches currently in stable-queue which might be from alexander.deucher@xxxxxxx are
queue-3.17/drm-radeon-use-gart-memory-for-dma-ring-tests.patch
queue-3.17/drm-radeon-fix-speaker-allocation-setup.patch
queue-3.17/drm-radeon-fix-vm-page-table-block-size-calculation.patch
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