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[SCSI] ibmvfc: Fix rport add/delete race resulting in oops

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Commit 43c8da907c introduced a race
condition which can occur when adding/deleting rports. There are
two possible threads now that can be deleting rports in the ibmvfc
driver, which can result in list_del being called twice, resulting
in an oops. This patch adds a new state to the ibmvfc_target struct
to indicate the target has been removed from the list and is in
the process of being deleted.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Brian King
2010-08-05 16:38:31 -05:00
committed by James Bottomley
parent 161155519c
commit d5da3040d7
2 changed files with 9 additions and 0 deletions
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drivers/scsi/ibmvscsi/ibmvfc.h
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@@ -597,6 +597,7 @@ enum ibmvfc_target_action {
IBMVFC_TGT_ACTION_INIT,
IBMVFC_TGT_ACTION_INIT_WAIT,
IBMVFC_TGT_ACTION_DEL_RPORT,
IBMVFC_TGT_ACTION_DELETED_RPORT,
};
struct ibmvfc_target {