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[SCSI] zfcp: Fix reference counter for remote ports 

Fix the remote port reference counter handling during ELS ADISC
commands and find the remote port by WWPN not by D_IDs that could
change.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Swen Schillig 2008-08-21 13:43:35 +02:00 committed by James Bottomley
parent f48bf7fb00
commit 9528539cc2
1 changed files with 9 additions and 16 deletions
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25
drivers/s390/scsi/zfcp_fc.c
View File

@ -39,18 +39,6 @@ struct zfcp_gpn_ft {
struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS];
};
static struct zfcp_port *zfcp_get_port_by_did(struct zfcp_adapter *adapter,
u32 d_id)
{
struct zfcp_port *port;
list_for_each_entry(port, &adapter->port_list_head, list)
if ((port->d_id == d_id) &&
!atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status))
return port;
return NULL;
}
static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
struct fcp_rscn_element *elem)
{
@ -341,12 +329,13 @@ void zfcp_test_link(struct zfcp_port *port)
zfcp_port_get(port);
retval = zfcp_fc_adisc(port);
if (retval == 0 || retval == -EBUSY)
if (retval == 0)
return;
/* send of ADISC was not possible */
zfcp_port_put(port);
zfcp_erp_port_forced_reopen(port, 0, 65, NULL);
if (retval != -EBUSY)
zfcp_erp_port_forced_reopen(port, 0, 65, NULL);
}
static int zfcp_scan_get_nameserver(struct zfcp_adapter *adapter)
@ -503,9 +492,13 @@ static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
acc->port_id[2];
/* skip the adapter's port and known remote ports */
if (acc->wwpn == fc_host_port_name(adapter->scsi_host) ||
zfcp_get_port_by_did(adapter, d_id))
if (acc->wwpn == fc_host_port_name(adapter->scsi_host))
continue;
port = zfcp_get_port_by_wwpn(adapter, acc->wwpn);
if (port) {
zfcp_port_get(port);
continue;
}
port = zfcp_port_enqueue(adapter, acc->wwpn,
ZFCP_STATUS_PORT_DID_DID |