netdev - [PATCH net 4/7] bnxt_en: Fix incorrect multicast rx mask setting when not requested

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Date:   Sun, 20 Feb 2022 04:05:50 -0500
From:   Michael Chan <michael.chan@...adcom.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, kuba@...nel.org, gospo@...adcom.com,
        Pavan Chebbi <pavan.chebbi@...adcom.com>
Subject: [PATCH net 4/7] bnxt_en: Fix incorrect multicast rx mask setting when not requested

From: Pavan Chebbi <pavan.chebbi@...adcom.com>

We should setup multicast only when net_device flags explicitly
has IFF_MULTICAST set. Otherwise we will incorrectly turn it on
even when not asked.  Fix it by only passing the multicast table
to the firmware if IFF_MULTICAST is set.

Fixes: 7d2837dd7a32 ("bnxt_en: Setup multicast properly after resetting device.")
Signed-off-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 785436f6dd24..fc5b1d816bdb 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -4747,8 +4747,10 @@ static int bnxt_hwrm_cfa_l2_set_rx_mask(struct bnxt *bp, u16 vnic_id)
 		return rc;
 
 	req->vnic_id = cpu_to_le32(vnic->fw_vnic_id);
-	req->num_mc_entries = cpu_to_le32(vnic->mc_list_count);
-	req->mc_tbl_addr = cpu_to_le64(vnic->mc_list_mapping);
+	if (vnic->rx_mask & CFA_L2_SET_RX_MASK_REQ_MASK_MCAST) {
+		req->num_mc_entries = cpu_to_le32(vnic->mc_list_count);
+		req->mc_tbl_addr = cpu_to_le64(vnic->mc_list_mapping);
+	}
 	req->mask = cpu_to_le32(vnic->rx_mask);
 	return hwrm_req_send_silent(bp, req);
 }
@@ -8651,7 +8653,7 @@ static int bnxt_init_chip(struct bnxt *bp, bool irq_re_init)
 	if (bp->dev->flags & IFF_ALLMULTI) {
 		vnic->rx_mask |= CFA_L2_SET_RX_MASK_REQ_MASK_ALL_MCAST;
 		vnic->mc_list_count = 0;
-	} else {
+	} else if (bp->dev->flags & IFF_MULTICAST) {
 		u32 mask = 0;
 
 		bnxt_mc_list_updated(bp, &mask);
@@ -10779,7 +10781,7 @@ static void bnxt_set_rx_mode(struct net_device *dev)
 	if (dev->flags & IFF_ALLMULTI) {
 		mask |= CFA_L2_SET_RX_MASK_REQ_MASK_ALL_MCAST;
 		vnic->mc_list_count = 0;
-	} else {
+	} else if (dev->flags & IFF_MULTICAST) {
 		mc_update = bnxt_mc_list_updated(bp, &mask);
 	}
 
@@ -10856,9 +10858,10 @@ static int bnxt_cfg_rx_mode(struct bnxt *bp)
 	    !bnxt_promisc_ok(bp))
 		vnic->rx_mask &= ~CFA_L2_SET_RX_MASK_REQ_MASK_PROMISCUOUS;
 	rc = bnxt_hwrm_cfa_l2_set_rx_mask(bp, 0);
-	if (rc && vnic->mc_list_count) {
+	if (rc && (vnic->rx_mask & CFA_L2_SET_RX_MASK_REQ_MASK_MCAST)) {
 		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_MCAST;
 		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);
-- 
2.18.1


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