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fnic: Using rport->dd_data to check rport online instead of rport_lookup. 

When issuing I/O we check if rport is online through libfc
rport_lookup() function which needs to be protected by mutex lock that
cannot acquired in I/O context. The change is to use midlayer remote
port s dd_data which is preserved until its devloss timeout and no
protection is required.  The the scsi_cmnd error code is expected to be
in the left 16 bits of the result field. Changed to correct this.  Fnic
driver version changed from 1.6.0.20 to 1.6.0.21

Signed-off-by: Satish Kharat <satishkh@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Reviewed-by: Ewan Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Satish Kharat 2016-03-18 11:22:50 -07:00 committed by Martin K. Petersen
parent a36f5dd07d
commit 1b6ac5e3ff
2 changed files with 12 additions and 10 deletions
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2
drivers/scsi/fnic/fnic.h
View File

@ -39,7 +39,7 @@
#define DRV_NAME "fnic"
#define DRV_DESCRIPTION "Cisco FCoE HBA Driver"
#define DRV_VERSION "1.6.0.20"
#define DRV_VERSION "1.6.0.21"
#define PFX DRV_NAME ": "
#define DFX DRV_NAME "%d: "

20
drivers/scsi/fnic/fnic_scsi.c
View File

@ -439,7 +439,6 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_
int sg_count = 0;
unsigned long flags = 0;
unsigned long ptr;
struct fc_rport_priv *rdata;
spinlock_t *io_lock = NULL;
int io_lock_acquired = 0;
@ -455,14 +454,17 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc, void (*done)(struct scsi_
return 0;
}
rdata = lp->tt.rport_lookup(lp, rport->port_id);
if (!rdata || (rdata->rp_state == RPORT_ST_DELETE)) {
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"returning IO as rport is removed\n");
atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
sc->result = DID_NO_CONNECT;
done(sc);
return 0;
if (rport) {
struct fc_rport_libfc_priv *rp = rport->dd_data;
if (!rp || rp->rp_state != RPORT_ST_READY) {
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"returning DID_NO_CONNECT for IO as rport is removed\n");
atomic64_inc(&fnic_stats->misc_stats.rport_not_ready);
sc->result = DID_NO_CONNECT<<16;
done(sc);
return 0;
}
}
if (lp->state != LPORT_ST_READY || !(lp->link_up))