[PATCH v2 12/26] qedf: fixup locking in qedf_restart_rport()

[Saurav Kashyap]

From: Hannes Reinecke <h...@suse.com>

fc_rport_create() needs to be called with disc_mutex held.
And we should re-assign the 'rdata' pointer in case it got changed.

Signed-off-by: Hannes Reinecke <h...@suse.com>
Signed-off-by: Saurav Kashyap <skash...@marvell.com>
---
 drivers/scsi/qedf/qedf_els.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/qedf/qedf_els.c b/drivers/scsi/qedf/qedf_els.c
index ac2bfc2..aad1f7c 100644
--- a/drivers/scsi/qedf/qedf_els.c
+++ b/drivers/scsi/qedf/qedf_els.c
@@ -380,10 +380,16 @@ void qedf_restart_rport(struct qedf_rport *fcport)
                QEDF_ERR(&(fcport->qedf->dbg_ctx),
                    "LOGO port_id=%x.\n", port_id);
                fc_rport_logoff(rdata);
+               mutex_lock(&lport->disc.disc_mutex);
                /* Recreate the rport and log back in */
                rdata = fc_rport_create(lport, port_id);
-               if (rdata)
+               if (rdata) {
+                       mutex_unlock(&lport->disc.disc_mutex);
                        fc_rport_login(rdata);
+                       fcport->rdata = rdata;
+               } else {
+                       mutex_unlock(&lport->disc.disc_mutex);
+               }
        }
        clear_bit(QEDF_RPORT_IN_RESET, &fcport->flags);
 }
-- 
1.8.3.1