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[SCSI] fnic: Kernel panic while running sh/nosh with max lun cfg 

Kernel panics due to NULL lport while executing the log message because
of synchronization issues between libfc and scsi transport fc. Checking
for NULL pointers at the beginning of this routine would resolve the issue
from kernel panic point of view.

Signed-off-by: Sesidhar Baddel <sebaddel@cisco.com>
Signed-off-by: Hiral Patel <hiralpat@cisco.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Sesidhar Beddel 2013-09-09 13:31:50 -07:00 committed by James Bottomley
parent 1259c5dc75
commit d0385d9265
1 changed files with 20 additions and 3 deletions
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23
drivers/scsi/fnic/fnic_scsi.c
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@ -1416,12 +1416,29 @@ void fnic_terminate_rport_io(struct fc_rport *rport)
unsigned long flags;
struct scsi_cmnd *sc;
struct scsi_lun fc_lun;
struct fc_rport_libfc_priv *rdata = rport->dd_data;
struct fc_lport *lport = rdata->local_port;
struct fnic *fnic = lport_priv(lport);
struct fc_rport_libfc_priv *rdata;
struct fc_lport *lport;
struct fnic *fnic;
struct fc_rport *cmd_rport;
enum fnic_ioreq_state old_ioreq_state;
if (!rport) {
printk(KERN_ERR "fnic_terminate_rport_io: rport is NULL\n");
return;
}
rdata = rport->dd_data;
if (!rdata) {
printk(KERN_ERR "fnic_terminate_rport_io: rdata is NULL\n");
return;
}
lport = rdata->local_port;
if (!lport) {
printk(KERN_ERR "fnic_terminate_rport_io: lport is NULL\n");
return;
}
fnic = lport_priv(lport);
FNIC_SCSI_DBG(KERN_DEBUG,
fnic->lport->host, "fnic_terminate_rport_io called"
" wwpn 0x%llx, wwnn0x%llx, rport 0x%p, portid 0x%06x\n",