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scsi: qedf: fc_rport_priv reference counting fixes

Telusuri Sumber 
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>
This commit is contained in:
Hannes Reinecke
2019-03-26 00:38:49 -07:00
committed by Martin K. Petersen
orang tua 6f15d0c029
melakukan 56efc304b1
3 mengubah file dengan 30 tambahan dan 9 penghapusan
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5
drivers/scsi/qedf/qedf_main.c
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@@ -1334,6 +1334,8 @@ static void qedf_upload_connection(struct qedf_ctx *qedf,
static void qedf_cleanup_fcport(struct qedf_ctx *qedf,
struct qedf_rport *fcport)
{
struct fc_rport_priv *rdata = fcport->rdata;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Cleaning up portid=%06x.\n",
fcport->rdata->ids.port_id);
@@ -1345,6 +1347,7 @@ static void qedf_cleanup_fcport(struct qedf_ctx *qedf,
qedf_free_sq(qedf, fcport);
fcport->rdata = NULL;
fcport->qedf = NULL;
kref_put(&rdata->kref, fc_rport_destroy);
}
/**
@@ -1420,6 +1423,8 @@ static void qedf_rport_event_handler(struct fc_lport *lport,
break;
}
/* Initial reference held on entry, so this can't fail */
kref_get(&rdata->kref);
fcport->rdata = rdata;
fcport->rport = rport;