Thread (36 messages) 36 messages, 6 authors, 2026-03-25

Re: [PATCH net-next v3 08/13] bnxt: use snapshot in bnxt_cfg_rx_mode

From: Michael Chan <michael.chan@broadcom.com>
Date: 2026-03-24 01:09:06
Also in: intel-wired-lan, linux-doc, linux-kselftest, linux-rdma, linux-wireless, lkml

On Thu, Mar 19, 2026 at 6:25 PM Stanislav Fomichev [off-list ref] wrote:
quoted hunk ↗ jump to hunk
With the introduction of ndo_set_rx_mode_async (as discussed in [0])
we can call bnxt_cfg_rx_mode directly. Convert bnxt_cfg_rx_mode to
use uc/mc snapshots and move its call in bnxt_sp_task to the
section that resets BNXT_STATE_IN_SP_TASK. Switch to direct call in
bnxt_set_rx_mode.

0: https://lore.kernel.org/netdev/CACKFLi=5vj8hPqEUKDd8RTw3au5G+zRgQEqjF+6NZnyoNm90KA@mail.gmail.com/ (local)

Cc: Michael Chan <michael.chan@broadcom.com>
Cc: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 26 ++++++++++++++---------
 1 file changed, 16 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 225217b32e4b..12265bd7fda4 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -11039,7 +11039,8 @@ static int bnxt_setup_nitroa0_vnic(struct bnxt *bp)
        return rc;
 }

-static int bnxt_cfg_rx_mode(struct bnxt *);
+static int bnxt_cfg_rx_mode(struct bnxt *, struct netdev_hw_addr_list *,
+                           struct netdev_hw_addr_list *);
 static bool bnxt_mc_list_updated(struct bnxt *, u32 *,
                                 const struct netdev_hw_addr_list *);
@@ -11135,7 +11136,7 @@ static int bnxt_init_chip(struct bnxt *bp, bool irq_re_init)
                vnic->rx_mask |= mask;
        }

-       rc = bnxt_cfg_rx_mode(bp);
+       rc = bnxt_cfg_rx_mode(bp, &bp->dev->uc, &bp->dev->mc);
        if (rc)
                goto err_out;
@@ -13610,11 +13611,12 @@ static void bnxt_set_rx_mode(struct net_device *dev,
        if (mask != vnic->rx_mask || uc_update || mc_update) {
                vnic->rx_mask = mask;

-               bnxt_queue_sp_work(bp, BNXT_RX_MASK_SP_EVENT);
+               bnxt_cfg_rx_mode(bp, uc, mc);
        }
 }

-static int bnxt_cfg_rx_mode(struct bnxt *bp)
+static int bnxt_cfg_rx_mode(struct bnxt *bp, struct netdev_hw_addr_list *uc,
+                           struct netdev_hw_addr_list *mc)
 {
        struct net_device *dev = bp->dev;
        struct bnxt_vnic_info *vnic = &bp->vnic_info[BNXT_VNIC_DEFAULT];
@@ -13623,7 +13625,7 @@ static int bnxt_cfg_rx_mode(struct bnxt *bp)
        bool uc_update;

        netif_addr_lock_bh(dev);
-       uc_update = bnxt_uc_list_updated(bp, &dev->uc);
+       uc_update = bnxt_uc_list_updated(bp, uc);
Will the uc list snapshot change between bnxt_set_rx_mode() and
bnxt_cfg_rx_mode() with the direct call now?  In the original deferred
update implementation, the uc list can change and that's why we check
in both functions.

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