releases/5.4.243/drm-vgem-add-missing-mutex_destroy.patch

From 5ea113537c3ad63df94b93bcf76715bf128b26a0 Mon Sep 17 00:00:00 2001
From: Sasha Levin <sashal@kernel.org>
Date: Thu, 2 Feb 2023 09:55:17 -0300
Subject: drm/vgem: add missing mutex_destroy
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Maíra Canal <mcanal@igalia.com>

[ 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@igalia.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20230202125517.427976-1-mcanal@igalia.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/vgem/vgem_fence.c | 1 +
 1 file changed, 1 insertion(+)

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);
 }
-- 
2.39.2