Author: np
Date: Mon Oct  5 18:47:12 2020
New Revision: 366457
URL: https://svnweb.freebsd.org/changeset/base/366457

Log:
  MFC r366244:
  
  cxgbe(4): display an error message when netmap cannot be enabled because
  the interface is down.
  
  Sponsored by: Chelsio Communications

Modified:
  stable/12/sys/dev/cxgbe/t4_netmap.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/dev/cxgbe/t4_netmap.c
==============================================================================
--- stable/12/sys/dev/cxgbe/t4_netmap.c Mon Oct  5 18:46:14 2020        
(r366456)
+++ stable/12/sys/dev/cxgbe/t4_netmap.c Mon Oct  5 18:47:12 2020        
(r366457)
@@ -536,8 +536,11 @@ cxgbe_netmap_on(struct adapter *sc, struct vi_info *vi
        MPASS(vi->nnmtxq > 0);
 
        if ((vi->flags & VI_INIT_DONE) == 0 ||
-           (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
+           (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
+               if_printf(ifp, "cannot enable netmap operation because "
+                   "interface is not UP.\n");
                return (EAGAIN);
+       }
 
        rxb = &sc->sge.rx_buf_info[0];
        for (i = 0; i < SW_ZONE_SIZES; i++, rxb++) {
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