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| author | phk <phk@FreeBSD.org> | 2005-03-31 12:19:44 +0000 |
|---|---|---|
| committer | phk <phk@FreeBSD.org> | 2005-03-31 12:19:44 +0000 |
| commit | 7af1e31761f34e698cdf576e46c042b327f5a612 (patch) | |
| tree | 3f79498c2fd283a3ff468ae4f9116e9f395f4fa7 /sys/dev/sound/pcm/mixer.c | |
| parent | bf21be6c028410767b09b4755acb72b254e317d8 (diff) | |
| download | FreeBSD-src-7af1e31761f34e698cdf576e46c042b327f5a612.zip FreeBSD-src-7af1e31761f34e698cdf576e46c042b327f5a612.tar.gz | |
Explicitly hold a reference to the cdev we have just cloned. This
closes the race where the cdev was reclaimed before it ever made it
back to devfs lookup.
Diffstat (limited to 'sys/dev/sound/pcm/mixer.c')
| -rw-r--r-- | sys/dev/sound/pcm/mixer.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/dev/sound/pcm/mixer.c b/sys/dev/sound/pcm/mixer.c index 5846847..9feccf6 100644 --- a/sys/dev/sound/pcm/mixer.c +++ b/sys/dev/sound/pcm/mixer.c @@ -494,8 +494,10 @@ mixer_clone(void *arg, char *name, int namelen, struct cdev **dev) return; if (strcmp(name, "mixer") == 0) { sd = devclass_get_softc(pcm_devclass, snd_unit); - if (sd != NULL) + if (sd != NULL) { *dev = sd->mixer_dev; + dev_ref(*dev); + } } } |
