[SCSI] libfcoe: fcoe: simplify receive FLOGI response

There was a locking problem where the fip->lock was held during
the call to update_mac().  The rtnl_lock() must be taken before
the fip->lock, not the other way around.  This fixes that.

Now that fcoe_ctlr_recv_flog() is called only from the response handler
to a FLOGI request, some checking can be eliminated.  Instead of calling
update_mac(), just fill in the granted_mac address for the passed-in
frame (skb).

Eliminate the passed-in source MAC address since it is also in the skb.

Also, in fcoe, call fcoe_set_src_mac() directly instead of going thru
the fip function pointer.  This will generate less code.
Then, since fip isn't needed for LOGO response, use lport as the arg.

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>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index 2aab97221c6..2988b71d1e8 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -1254,10 +1254,9 @@ static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
 }
 
 /**
- * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response or request
+ * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response
  * @fip: The FCoE controller
  * @fp:	 The FC frame to snoop
- * @sa:	 Ethernet source MAC address from received FCoE frame
  *
  * Snoop potential response to FLOGI or even incoming FLOGI.
  *
@@ -1265,16 +1264,18 @@ static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
  * by fip->flogi_oxid != FC_XID_UNKNOWN.
  *
  * The caller is responsible for freeing the frame.
+ * Fill in the granted_mac address.
  *
  * Return non-zero if the frame should not be delivered to libfc.
  */
 int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
-			 struct fc_frame *fp, u8 *sa)
+			 struct fc_frame *fp)
 {
 	struct fc_frame_header *fh;
 	u8 op;
-	u8 mac[ETH_ALEN];
+	u8 *sa;
 
+	sa = eth_hdr(&fp->skb)->h_source;
 	fh = fc_frame_header_get(fp);
 	if (fh->fh_type != FC_TYPE_ELS)
 		return 0;
@@ -1305,9 +1306,8 @@ int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
 			fip->map_dest = 0;
 		}
 		fip->flogi_oxid = FC_XID_UNKNOWN;
-		fc_fcoe_set_mac(mac, fh->fh_d_id);
-		fip->update_mac(lport, mac);
 		spin_unlock_bh(&fip->lock);
+		fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id);
 	} else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
 		/*
 		 * Save source MAC for point-to-point responses.