1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 9a0b2a9caad6..4f7ef76aa795 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -1743,8 +1743,16 @@ void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
         mfs = ntohs(flp->fl_csp.sp_bb_data) &
                 FC_SP_BB_DATA_MASK;
         if (mfs >= FC_SP_MIN_MAX_PAYLOAD &&
-            mfs < lport->mfs)
+            mfs <= lport->mfs) {
                 lport->mfs = mfs;
+                fc_host_maxframe_size(lport->host) = mfs;
+        } else {
+                FC_LPORT_DBG(lport, "FLOGI bad mfs:%hu response, "
+                             "lport->mfs:%hu\n", mfs, lport->mfs);
+                fc_lport_error(lport, fp);
+                goto err;
+        }
+
         csp_flags = ntohs(flp->fl_csp.sp_features);
         r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov);
         e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov);