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Just try to unmap a buffer when something has been mapped before.

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ok semarie tb
This commit is contained in:
mglocker 2016-06-02 07:47:25 +00:00
parent d4793e821b
commit 9d46737716
1 changed files with 7 additions and 5 deletions
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12
app/video/video.c
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@ -1,4 +1,4 @@
/* $OpenBSD: video.c,v 1.14 2016/05/31 08:45:14 tb Exp $ */
/* $OpenBSD: video.c,v 1.15 2016/06/02 07:47:25 mglocker Exp $ */
/*
* Copyright (c) 2010 Jacob Meuser <jakemsr@openbsd.org>
*
@ -1313,10 +1313,12 @@ mmap_stop(struct video *vid)
/* unmap the buffers */
for (i = 0; i < MMAP_NUM_BUFS; i++) {
r = munmap(vid->mmap_buffer[i], vid->bpf);
if (r == -1) {
warn("munmap");
return 0;
if (vid->mmap_buffer[i] != NULL) {
r = munmap(vid->mmap_buffer[i], vid->bpf);
if (r == -1) {
warn("munmap");
return 0;
}
}
}