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(parent: 1119865) | patch
fix race that can give duplicate host number
authorJoe Eykholt <jeykholt@cisco.com>
Tue, 16 Jun 2009 06:22:14 +0000 (23:22 -0700)
committerJames Bottomley <James.Bottomley@HansenPartnership.com>
Sun, 21 Jun 2009 15:52:42 +0000 (10:52 -0500)
commit30c9afa6cc477f6f21f8a0b36f3b81080941a0c9
tree863c391cc13e13d005e55096ff3436e973c06453tree | snapshot
parent111986593561fc4c94a1fba3f3cd84476fb40b22commit | diff
fix race that can give duplicate host number

Just once, two fcoe instances got the same host number
from scsi_add_host().

Use atomic_t and atomic_inc_return() to get next host number.
Subtract 1, so that scsi_host still starts with 0.

[jejb: added comment about unusual subtraction]
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
drivers/scsi/hosts.c diff | blob | history
Full containers within linux kernel