[SCSI] ibmvfc: Handle port login required response

The virtual fibre channel stack can return a failure response for a command
indicating the port login has been invalidated without sending the client
an async event. Add code to handle this response and initiate a PLOGI.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h
index 526bca7..6b86e1f 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.h
+++ b/drivers/scsi/ibmvscsi/ibmvfc.h
@@ -109,6 +109,7 @@
 	IBMVFC_TRANS_CANCELLED			= 0x0006,
 	IBMVFC_TRANS_CANCELLED_IMPLICIT	= 0x0007,
 	IBMVFC_INSUFFICIENT_RESOURCE		= 0x0008,
+	IBMVFC_PLOGI_REQUIRED			= 0x0010,
 	IBMVFC_COMMAND_FAILED			= 0x8000,
 };