Mesa (master): winsys/radeon: Destroy fd_hash table when the last winsys is removed.

[Jan Vesely]

Module: Mesa
Branch: master
Commit: 45dfa6f4e77fbb21f312eb6101db6c25acd4d483
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=45dfa6f4e77fbb21f312eb6101db6c25acd4d483

Author: Jan Vesely <jan.vesely at rutgers.edu>
Date:   Tue May  8 01:39:04 2018 -0400

winsys/radeon: Destroy fd_hash table when the last winsys is removed.

Fixes memory leak on module unload.
v2: Use util_hash_table helper function

CC: <mesa-stable at lists.freedesktop.org>
Reviewed-by: Marek Olšák <marek.olsak at amd.com>
Signed-off-by: Jan Vesely <jan.vesely at rutgers.edu>

---

 src/gallium/winsys/radeon/drm/radeon_drm_winsys.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c b/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c
index 3ee243adbc..253dd4e2eb 100644
--- a/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c
+++ b/src/gallium/winsys/radeon/drm/radeon_drm_winsys.c
@@ -719,8 +719,13 @@ static bool radeon_winsys_unref(struct radeon_winsys *ws)
     mtx_lock(&fd_tab_mutex);
 
     destroy = pipe_reference(&rws->reference, NULL);
-    if (destroy && fd_tab)
+    if (destroy && fd_tab) {
         util_hash_table_remove(fd_tab, intptr_to_pointer(rws->fd));
+        if (util_hash_table_count(fd_tab) == 0) {
+           util_hash_table_destroy(fd_tab);
+           fd_tab = NULL;
+        }
+    }
 
     mtx_unlock(&fd_tab_mutex);
     return destroy;