This is a note to let you know that I've just added the patch titled
drm/ttm: once more fix ttm_buffer_object_transfer
to the 4.9-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-ttm-once-more-fix-ttm_buffer_object_transfer.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4d98e5ee6084f6d7bc578c5d5f86de7156aaa4cb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@xxxxxxx>
Date: Mon, 30 Oct 2017 14:57:43 +0100
Subject: drm/ttm: once more fix ttm_buffer_object_transfer
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From: Christian König <christian.koenig@xxxxxxx>
commit 4d98e5ee6084f6d7bc578c5d5f86de7156aaa4cb upstream.
When the mutex is locked just in the moment we copy it we end up with a
warning that we release a locked mutex.
Fix this by properly reinitializing the mutex.
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/ttm/ttm_bo_util.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -473,6 +473,7 @@ static int ttm_buffer_object_transfer(st
INIT_LIST_HEAD(&fbo->lru);
INIT_LIST_HEAD(&fbo->swap);
INIT_LIST_HEAD(&fbo->io_reserve_lru);
+ mutex_init(&fbo->wu_mutex);
fbo->moving = NULL;
drm_vma_node_reset(&fbo->vma_node);
atomic_set(&fbo->cpu_writers, 0);
Patches currently in stable-queue which might be from christian.koenig@xxxxxxx are
queue-4.9/drm-ttm-once-more-fix-ttm_buffer_object_transfer.patch
queue-4.9/drm-amdgpu-potential-uninitialized-variable-in-amdgpu_vce_ring_parse_cs.patch
queue-4.9/drm-amdgpu-potential-uninitialized-variable-in-amdgpu_vm_update_directories.patch