Patch "drm/ttm: once more fix ttm_buffer_object_transfer" has been added to the 4.14-stable tree

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 4.14-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-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: =?UTF-8?q?Christian=20K=C3=B6nig?= <[email protected]>
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 <[email protected]>

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.

---
 drivers/gpu/drm/ttm/ttm_bo_util.c |    1 +
 1 file changed, 1 insertion(+)

@@ -474,6 +474,7 @@ 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 [email protected] are

queue-4.14/drm-ttm-fix-ttm_bo_cleanup_refs_or_queue-once-more.patch queue-4.14/drm-ttm-once-more-fix-ttm_buffer_object_transfer.patch queue-4.14/drm-amdgpu-potential-uninitialized-variable-in-amdgpu_vce_ring_parse_cs.patch queue-4.14/drm-amdgpu-reserve-root-pd-while-releasing-it.patch queue-4.14/drm-amdgpu-properly-allocate-vm-invalidate-eng-v2.patch queue-4.14/drm-amdgpu-set-adev-vcn.irq.num_types-for-vcn.patch queue-4.14/drm-amdgpu-potential-uninitialized-variable-in-amdgpu_vm_update_directories.patch queue-4.14/drm-amdgpu-fix-error-handling-in-amdgpu_bo_do_create.patch queue-4.14/drm-ttm-always-and-only-destroy-bo-ttm_resv-in-ttm_bo_release_list.patch queue-4.14/dma-buf-make-reservation_object_copy_fences-rcu-save.patch queue-4.14/drm-amdgpu-move-uvd-vce-and-vcn-structure-out-from-union.patch