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| author | Ed Cashin <ecashin@coraid.com> | 2012-12-17 16:04:03 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-17 17:15:25 -0800 |
| commit | e0b2bbab0b569590e27161290f6ea549248356df (patch) | |
| tree | 48525151e94b2206c6508b38ae978aabb7ead8ba /drivers/block/aoe/aoedev.c | |
| parent | 60116cf77310c10b573552e4d700c270ddadba76 (diff) | |
| download | linux-e0b2bbab0b569590e27161290f6ea549248356df.tar.gz linux-e0b2bbab0b569590e27161290f6ea549248356df.tar.bz2 linux-e0b2bbab0b569590e27161290f6ea549248356df.zip | |
aoe: make error messages more specific in static minor allocation
For some special-purpose systems where udev isn't present, static
allocation of minor numbers is desirable. This update distinguishes
different failure scenarios, to help the user understand what went
wrong.
Signed-off-by: Ed Cashin <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/block/aoe/aoedev.c')
| -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 91f7c99eb2a9..88ccd6d83c39 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; } |