Patch "drm/vgem: add missing mutex_destroy" has been added to the 5.4-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    drm/vgem: add missing mutex_destroy

to the 5.4-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-vgem-add-missing-mutex_destroy.patch
and it can be found in the queue-5.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 5ea113537c3ad63df94b93bcf76715bf128b26a0
Author: Maíra Canal <mcanal@xxxxxxxxxx>
Date:   Thu Feb 2 09:55:17 2023 -0300

    drm/vgem: add missing mutex_destroy
    
    [ Upstream commit 7c18189b14b33c1fbf76480b1bd217877c086e67 ]
    
    vgem_fence_open() instantiates a mutex for a particular fence
    instance, but never destroys it by calling mutex_destroy() in
    vgem_fence_close().
    
    So, add the missing mutex_destroy() to guarantee proper resource
    destruction.
    
    Fixes: 407779848445 ("drm/vgem: Attach sw fences to exported vGEM dma-buf (ioctl)")
    Signed-off-by: Maíra Canal <mcanal@xxxxxxxxxx>
    Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@xxxxxxxxxxxxxxx>
    Signed-off-by: Maíra Canal <mairacanal@xxxxxxxxxx>
    Link: https://patchwork.freedesktop.org/patch/msgid/20230202125517.427976-1-mcanal@xxxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/vgem/vgem_fence.c b/drivers/gpu/drm/vgem/vgem_fence.c
index 9268f6fc3f662..92895937aba9b 100644
--- a/drivers/gpu/drm/vgem/vgem_fence.c
+++ b/drivers/gpu/drm/vgem/vgem_fence.c
@@ -249,4 +249,5 @@ void vgem_fence_close(struct vgem_file *vfile)
 {
 	idr_for_each(&vfile->fence_idr, __vgem_fence_idr_fini, vfile);
 	idr_destroy(&vfile->fence_idr);
+	mutex_destroy(&vfile->fence_mutex);
 }