diff options
| -rw-r--r-- | drivers/block/aoe/aoedev.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/drivers/block/aoe/aoedev.c b/drivers/block/aoe/aoedev.c index 91f7c99eb2a..88ccd6d83c3 100644 --- a/drivers/block/aoe/aoedev.c +++ b/drivers/block/aoe/aoedev.c @@ -69,25 +69,34 @@ minor_get_static(ulong *sysminor, ulong aoemaj, int aoemin) NPERSHELF = 16, }; + if (aoemin >= NPERSHELF) { + pr_err("aoe: %s %d slots per shelf\n", + "static minor device numbers support only", + NPERSHELF); + error = -1; + goto out; + } + n = aoemaj * NPERSHELF + aoemin; - if (aoemin >= NPERSHELF || n >= N_DEVS) { + if (n >= N_DEVS) { pr_err("aoe: %s with e%ld.%d\n", "cannot use static minor device numbers", aoemaj, aoemin); error = -1; - } else { - spin_lock_irqsave(&used_minors_lock, flags); - if (test_bit(n, used_minors)) { - pr_err("aoe: %s %lu\n", - "existing device already has static minor number", - n); - error = -1; - } else - set_bit(n, used_minors); - spin_unlock_irqrestore(&used_minors_lock, flags); + goto out; } + spin_lock_irqsave(&used_minors_lock, flags); + if (test_bit(n, used_minors)) { + pr_err("aoe: %s %lu\n", + "existing device already has static minor number", + n); + error = -1; + } else + set_bit(n, used_minors); + spin_unlock_irqrestore(&used_minors_lock, flags); *sysminor = n; +out: return error; } |