[PATCH] drm/xe: Destroy mutex on gpu_buddy_init failure in VRAM manager init

[Tejas Upadhyay <tejas.upadhyay@intel.com>]

In __xe_ttm_vram_mgr_init(), if gpu_buddy_init() fails, the function
returns early without calling mutex_destroy() on mgr->lock which was
previously initialized via mutex_init(). The normal cleanup path in
xe_ttm_vram_mgr_fini() is registered via drmm_add_action_or_reset()
only after gpu_buddy_init() succeeds, so it never runs for this error
case.

Add mutex_destroy() before the early return to properly clean up the
initialized mutex.

Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM buddy based VRAM manager")
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
---
 drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
index 5fd0d5506a7e..3189e4b7ad05 100644
--- a/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
+++ b/drivers/gpu/drm/xe/xe_ttm_vram_mgr.c
@@ -319,8 +319,10 @@ int __xe_ttm_vram_mgr_init(struct xe_device *xe, struct xe_ttm_vram_mgr *mgr,
 
 	ttm_resource_manager_init(man, &xe->ttm, size);
 	err = gpu_buddy_init(&mgr->mm, man->size, default_page_size);
-	if (err)
+	if (err) {
+		mutex_destroy(&mgr->lock);
 		return err;
+	}
 
 	ttm_set_driver_manager(&xe->ttm, mem_type, &mgr->manager);
 	ttm_resource_manager_set_used(&mgr->manager, true);
-- 
2.52.0