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: NEd Cashin <ecashin@coraid.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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