scsi: libfc: Fixup disc_mutex handling

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The list of attached 'rdata' remote port structures is RCU
protected, so there is no need to take the 'disc_mutex' when
traversing it.
Rather we should be using rcu_read_lock() and kref_get_unless_zero()
to validate the entries.
We need, however, take the disc_mutex when deleting an entry;
otherwise we risk clashes with list_add.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Hannes Reinecke 2016-09-30 11:01:15 +02:00 • committed by Martin K. Petersen

parent 4d2095cc42

commit a407c59339

4 changed files with 63 additions and 23 deletions

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39

drivers/scsi/fcoe/fcoe_ctlr.c

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38

drivers/scsi/libfc/fc_disc.c

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9

drivers/scsi/libfc/fc_lport.c

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2

drivers/scsi/libfc/fc_rport.c

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