Module Name: src
Committed By: riastradh
Date: Thu Feb 17 01:38:38 UTC 2022
Modified Files:
src/sys/external/bsd/drm2/linux: linux_dma_buf.c
Log Message:
drm: Fix membars around dma_buf_put reference count release.
To generate a diff of this commit:
cvs rdiff -u -r1.13 -r1.14 src/sys/external/bsd/drm2/linux/linux_dma_buf.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/external/bsd/drm2/linux/linux_dma_buf.c
diff -u src/sys/external/bsd/drm2/linux/linux_dma_buf.c:1.13 src/sys/external/bsd/drm2/linux/linux_dma_buf.c:1.14
--- src/sys/external/bsd/drm2/linux/linux_dma_buf.c:1.13 Sun Dec 19 12:01:40 2021
+++ src/sys/external/bsd/drm2/linux/linux_dma_buf.c Thu Feb 17 01:38:38 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: linux_dma_buf.c,v 1.13 2021/12/19 12:01:40 riastradh Exp $ */
+/* $NetBSD: linux_dma_buf.c,v 1.14 2022/02/17 01:38:38 riastradh Exp $ */
/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: linux_dma_buf.c,v 1.13 2021/12/19 12:01:40 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: linux_dma_buf.c,v 1.14 2022/02/17 01:38:38 riastradh Exp $");
#include <sys/types.h>
#include <sys/atomic.h>
@@ -160,8 +160,10 @@ void
dma_buf_put(struct dma_buf *dmabuf)
{
+ membar_exit();
if (atomic_dec_uint_nv(&dmabuf->db_refcnt) != 0)
return;
+ membar_enter();
dma_resv_poll_fini(&dmabuf->db_resv_poll);
mutex_destroy(&dmabuf->db_lock);
