From 797a68c9de0f5a5447baf4bd3bb9c10a3993435b Mon Sep 17 00:00:00 2001
From: Sean Anderson <sean.anderson@linux.dev>
Date: Thu, 22 Aug 2024 11:40:56 -0400
Subject: [PATCH] net: xilinx: axienet: Fix dangling multicast addresses
If a multicast address is removed but there are still some multicast
addresses, that address would remain programmed into the frame filter.
Fix this by explicitly setting the enable bit for each filter.
Fixes: 8a3b7a252dca ("drivers/net/ethernet/xilinx: added Xilinx AXI Ethernet driver")
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240822154059.1066595-3-sean.anderson@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/net/ethernet/xilinx/xilinx_axienet.h | 1 +
.../net/ethernet/xilinx/xilinx_axienet_main.c | 21 ++++++++-----------
2 files changed, 10 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet.h b/drivers/net/ethernet/xilinx/xilinx_axienet.h
index c7d9221fafdcb..09c9f9787180b 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet.h
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet.h
@@ -170,6 +170,7 @@
#define XAE_UAW0_OFFSET 0x00000700 /* Unicast address word 0 */
#define XAE_UAW1_OFFSET 0x00000704 /* Unicast address word 1 */
#define XAE_FMI_OFFSET 0x00000708 /* Frame Filter Control */
+#define XAE_FFE_OFFSET 0x0000070C /* Frame Filter Enable */
#define XAE_AF0_OFFSET 0x00000710 /* Address Filter 0 */
#define XAE_AF1_OFFSET 0x00000714 /* Address Filter 1 */
diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
index 163d052480071..9aeb7b9f3ae40 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -432,7 +432,7 @@ static int netdev_set_mac_address(struct net_device *ndev, void *p)
*/
static void axienet_set_multicast_list(struct net_device *ndev)
{
- int i;
+ int i = 0;
u32 reg, af0reg, af1reg;
struct axienet_local *lp = netdev_priv(ndev);
@@ -454,7 +454,6 @@ static void axienet_set_multicast_list(struct net_device *ndev)
reg &= ~XAE_FMI_PM_MASK;
axienet_iow(lp, XAE_FMI_OFFSET, reg);
- i = 0;
netdev_for_each_mc_addr(ha, ndev) {
if (i >= XAE_MULTICAST_CAM_TABLE_NUM)
break;
@@ -473,6 +472,7 @@ static void axienet_set_multicast_list(struct net_device *ndev)
axienet_iow(lp, XAE_FMI_OFFSET, reg);
axienet_iow(lp, XAE_AF0_OFFSET, af0reg);
axienet_iow(lp, XAE_AF1_OFFSET, af1reg);
+ axienet_iow(lp, XAE_FFE_OFFSET, 1);
i++;
}
} else {
@@ -480,18 +480,15 @@ static void axienet_set_multicast_list(struct net_device *ndev)
reg &= ~XAE_FMI_PM_MASK;
axienet_iow(lp, XAE_FMI_OFFSET, reg);
-
- for (i = 0; i < XAE_MULTICAST_CAM_TABLE_NUM; i++) {
- reg = axienet_ior(lp, XAE_FMI_OFFSET) & 0xFFFFFF00;
- reg |= i;
-
- axienet_iow(lp, XAE_FMI_OFFSET, reg);
- axienet_iow(lp, XAE_AF0_OFFSET, 0);
- axienet_iow(lp, XAE_AF1_OFFSET, 0);
- }
-
dev_info(&ndev->dev, "Promiscuous mode disabled.\n");
}
+
+ for (; i < XAE_MULTICAST_CAM_TABLE_NUM; i++) {
+ reg = axienet_ior(lp, XAE_FMI_OFFSET) & 0xFFFFFF00;
+ reg |= i;
+ axienet_iow(lp, XAE_FMI_OFFSET, reg);
+ axienet_iow(lp, XAE_FFE_OFFSET, 0);
+ }
}
/**
--
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