diff options
Diffstat (limited to 'usr/src/uts/common/io/tl.c')
| -rw-r--r-- | usr/src/uts/common/io/tl.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/usr/src/uts/common/io/tl.c b/usr/src/uts/common/io/tl.c index 73c47d2fb2..e6b3d41625 100644 --- a/usr/src/uts/common/io/tl.c +++ b/usr/src/uts/common/io/tl.c @@ -1419,8 +1419,9 @@ tl_closeok(tl_endpt_t *tep) static int tl_open(queue_t *rq, dev_t *devp, int oflag, int sflag, cred_t *credp) { - tl_endpt_t *tep; - minor_t minor = getminor(*devp); + tl_endpt_t *tep; + minor_t minor = getminor(*devp); + id_t inst_minor; /* * Driver is called directly. Both CLONEOPEN and MODOPEN @@ -1440,6 +1441,14 @@ tl_open(queue_t *rq, dev_t *devp, int oflag, int sflag, cred_t *credp) minor |= TL_SOCKET; } + /* + * Attempt to allocate a unique minor number for this instance. + * Avoid an uninterruptable sleep if none are available. + */ + if ((inst_minor = id_alloc_nosleep(tl_minors)) == -1) { + return (ENOMEM); + } + tep = kmem_cache_alloc(tl_cache, KM_SLEEP); tep->te_refcnt = 1; tep->te_cpid = curproc->p_pid; @@ -1451,9 +1460,7 @@ tl_open(queue_t *rq, dev_t *devp, int oflag, int sflag, cred_t *credp) tep->te_flag = minor & TL_MINOR_MASK; tep->te_transport = &tl_transports[minor]; - - /* Allocate a unique minor number for this instance. */ - tep->te_minor = (minor_t)id_alloc(tl_minors); + tep->te_minor = (minor_t)inst_minor; /* Reserve hash handle for bind(). */ (void) mod_hash_reserve(tep->te_addrhash, &tep->te_hash_hndl); |