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| author | Poul-Henning Kamp <phk@FreeBSD.org> | 2004-09-24 08:12:41 +0000 |
|---|---|---|
| committer | Poul-Henning Kamp <phk@FreeBSD.org> | 2004-09-24 08:12:41 +0000 |
| commit | 969d098b0f5106557a98299972f56424bcd0838a (patch) | |
| tree | 572cca4c1b81538ce656a5490678b6a185db5edd /sys/dev/snp | |
| parent | 9fb3aed0f65490f3568fc27737e334401d880b59 (diff) | |
| download | src-969d098b0f5106557a98299972f56424bcd0838a.tar.gz src-969d098b0f5106557a98299972f56424bcd0838a.zip | |
Hold thread reference while we frob cdevsw.
Notes
Notes:
svn path=/head/; revision=135724
Diffstat (limited to 'sys/dev/snp')
| -rw-r--r-- | sys/dev/snp/snp.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sys/dev/snp/snp.c b/sys/dev/snp/snp.c index 6103a5d651f3..a414d7c5fec3 100644 --- a/sys/dev/snp/snp.c +++ b/sys/dev/snp/snp.c @@ -184,11 +184,17 @@ snpdevtotty(dev) struct cdev *dev; { struct cdevsw *cdp; + struct tty *tp; - cdp = devsw(dev); - if (cdp == NULL || (cdp->d_flags & D_TTY) == 0) + cdp = dev_refthread(dev); + if (cdp == NULL) return (NULL); - return (dev->si_tty); + if (!(cdp->d_flags & D_TTY)) + tp = NULL; + else + tp = dev->si_tty; + dev_relthread(dev); + return (tp); } #define SNP_INPUT_BUF 5 /* This is even too much, the maximal |