[SCSI] libfc: convert rport lookup to be RCU safe
To allow LLD to do lookups on rports without grabbing a mutex,
make them RCU-safe. The caller of lport->tt.rport_lookup will
have the choice of holding disc_mutex or the rcu_read_lock().
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c
index c7985da..d0fa9a0 100644
--- a/drivers/scsi/libfc/fc_disc.c
+++ b/drivers/scsi/libfc/fc_disc.c
@@ -63,12 +63,12 @@
void fc_disc_stop_rports(struct fc_disc *disc)
{
struct fc_lport *lport;
- struct fc_rport_priv *rdata, *next;
+ struct fc_rport_priv *rdata;
lport = disc->lport;
mutex_lock(&disc->disc_mutex);
- list_for_each_entry_safe(rdata, next, &disc->rports, peers)
+ list_for_each_entry_rcu(rdata, &disc->rports, peers)
lport->tt.rport_logoff(rdata);
mutex_unlock(&disc->disc_mutex);
}
@@ -292,7 +292,7 @@
* Skip ports which were never discovered. These are the dNS port
* and ports which were created by PLOGI.
*/
- list_for_each_entry(rdata, &disc->rports, peers) {
+ list_for_each_entry_rcu(rdata, &disc->rports, peers) {
if (!rdata->disc_id)
continue;
if (rdata->disc_id == disc->disc_id)