bnxt_en: Improve multicast address setup logic.

[ Upstream commit b4e30e8e7ea1d1e35ffd64ca46f7d9a7f227b4bf ]

The driver builds a list of multicast addresses and sends it to the
firmware when the driver's ndo_set_rx_mode() is called.  In rare
cases, the firmware can fail this call if internal resources to
add multicast addresses are exhausted.  In that case, we should
try the call again by setting the ALL_MCAST flag which is more
guaranteed to succeed.

Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 581ad0a..0268035 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -7441,8 +7441,15 @@ static int bnxt_cfg_rx_mode(struct bnxt *bp)
 
 skip_uc:
        rc = bnxt_hwrm_cfa_l2_set_rx_mask(bp, 0);
+       if (rc && vnic->mc_list_count) {
+               netdev_info(bp->dev, "Failed setting MC filters rc: %d, turning on ALL_MCAST mode\n",
+                           rc);
+               vnic->rx_mask |= CFA_L2_SET_RX_MASK_REQ_MASK_ALL_MCAST;
+               vnic->mc_list_count = 0;
+               rc = bnxt_hwrm_cfa_l2_set_rx_mask(bp, 0);
+       }
        if (rc)
-               netdev_err(bp->dev, "HWRM cfa l2 rx mask failure rc: %x\n",
+               netdev_err(bp->dev, "HWRM cfa l2 rx mask failure rc: %d\n",
                           rc);
 
        return rc;