[SCSI] libfcoe: update FIP FCF D flag from advertisments

Allow the D flag (indicating that keep-alives are not needed) to
be updated dynamically from received FIP advertisements.

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, 9 insertions, 6 deletions

diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index 4893098b3d3..27c21ca802b 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -769,18 +769,21 @@ static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
                 list_add(&fcf->list, &fip->fcfs);
         } else {
                 /*
-                 * Flags in advertisements are ignored once the FCF is
-                 * selected.  Flags in unsolicited advertisements are
-                 * ignored after a usable solicited advertisement
-                 * has been received.
+                 * Update the FCF's keep-alive descriptor flags.
+                 * Other flag changes from new advertisements are
+                 * ignored after a solicited advertisement is
+                 * received and the FCF is selectable (usable).
                  */
+                fcf->fd_flags = new.fd_flags;
+                if (!fcoe_ctlr_fcf_usable(fcf))
+                        fcf->flags = new.flags;
+
                 if (fcf == fip->sel_fcf && !fcf->fd_flags) {
                         fip->ctlr_ka_time -= fcf->fka_period;
                         fip->ctlr_ka_time += new.fka_period;
                         if (time_before(fip->ctlr_ka_time, fip->timer.expires))
                                 mod_timer(&fip->timer, fip->ctlr_ka_time);
-                } else if (!fcoe_ctlr_fcf_usable(fcf))
-                        fcf->flags = new.flags;
+                }
                 fcf->fka_period = new.fka_period;
                 memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN);
         }