diff options
Diffstat (limited to 'sys/dev/snp/snp.c')
| -rw-r--r-- | sys/dev/snp/snp.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/sys/dev/snp/snp.c b/sys/dev/snp/snp.c index 3bcd2263809b..37c1c075a76e 100644 --- a/sys/dev/snp/snp.c +++ b/sys/dev/snp/snp.c @@ -125,6 +125,7 @@ snp_dtor(void *data) tty_lock(tp); ttyoutq_free(&ss->snp_outq); ttyhook_unregister(tp); + ss->snp_tty = NULL; } cv_destroy(&ss->snp_outwait); @@ -252,9 +253,19 @@ snp_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, case SNPSTTY: /* Bind TTY to snoop instance. */ SNP_LOCK(); - if (ss->snp_tty != NULL) { + tp = ss->snp_tty; + if (tp != NULL) { + if (*(int *)data == -1) { + tty_lock(tp); + ss->snp_tty = NULL; + ttyoutq_free(&ss->snp_outq); + ttyhook_unregister(tp); + error = 0; + } else { + error = EBUSY; + } SNP_UNLOCK(); - return (EBUSY); + return (error); } /* * XXXRW / XXXJA: no capability check here. |