diff options
| author | Hannes Reinecke <hare@suse.com> | 2019-03-26 10:38:49 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-03-28 04:54:53 +0300 |
| commit | 56efc304b18cbfa4a2b355c0ae817f61acea38c4 (patch) | |
| tree | 3d07b1605b8dcb121ee71eaa655bcb5f469e9180 /drivers/scsi/qedf/qedf_els.c | |
| parent | 6f15d0c02950c75f85542031ccbf6a9725ca9925 (diff) | |
| download | linux-56efc304b18cbfa4a2b355c0ae817f61acea38c4.tar.xz | |
scsi: qedf: fc_rport_priv reference counting fixes
The fc_rport_priv structure is reference counted, so we need to ensure that
the reference is increased before accessing the structure.
Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/qedf/qedf_els.c')
| -rw-r--r-- | drivers/scsi/qedf/qedf_els.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/scsi/qedf/qedf_els.c b/drivers/scsi/qedf/qedf_els.c index f1f576375de4..1781e732d24a 100644 --- a/drivers/scsi/qedf/qedf_els.c +++ b/drivers/scsi/qedf/qedf_els.c @@ -378,12 +378,18 @@ void qedf_restart_rport(struct qedf_rport *fcport) spin_unlock_irqrestore(&fcport->rport_lock, flags); rdata = fcport->rdata; - if (rdata) { + if (rdata && !kref_get_unless_zero(&rdata->kref)) { + fcport->rdata = NULL; + rdata = NULL; + } + + if (rdata && rdata->rp_state == RPORT_ST_READY) { lport = fcport->qedf->lport; port_id = rdata->ids.port_id; QEDF_ERR(&(fcport->qedf->dbg_ctx), "LOGO port_id=%x.\n", port_id); fc_rport_logoff(rdata); + kref_put(&rdata->kref, fc_rport_destroy); mutex_lock(&lport->disc.disc_mutex); /* Recreate the rport and log back in */ rdata = fc_rport_create(lport, port_id); @@ -393,6 +399,7 @@ void qedf_restart_rport(struct qedf_rport *fcport) fcport->rdata = rdata; } else { mutex_unlock(&lport->disc.disc_mutex); + fcport->rdata = NULL; } } clear_bit(QEDF_RPORT_IN_RESET, &fcport->flags); |