Patch "net: txgbe: fix to control VLAN strip" has been added to the 6.8-stable tree

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This is a note to let you know that I've just added the patch titled

    net: txgbe: fix to control VLAN strip

to the 6.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-txgbe-fix-to-control-vlan-strip.patch
and it can be found in the queue-6.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 3a81d6d321d165c7b5de03164b0947160239a203
Author: Jiawen Wu <jiawenwu@xxxxxxxxxxxxxx>
Date:   Fri May 17 14:51:40 2024 +0800

    net: txgbe: fix to control VLAN strip
    
    [ Upstream commit 1d3c6414950badaa38002af3b5857e01a21f01e9 ]
    
    When VLAN tag strip is changed to enable or disable, the hardware requires
    the Rx ring to be in a disabled state, otherwise the feature cannot be
    changed.
    
    Fixes: f3b03c655f67 ("net: wangxun: Implement vlan add and kill functions")
    Signed-off-by: Jiawen Wu <jiawenwu@xxxxxxxxxxxxxx>
    Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
index 945c13d1a9829..c09a6f7445754 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
@@ -1958,6 +1958,8 @@ int wx_sw_init(struct wx *wx)
 		return -ENOMEM;
 	}
 
+	bitmap_zero(wx->state, WX_STATE_NBITS);
+
 	return 0;
 }
 EXPORT_SYMBOL(wx_sw_init);
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
index 25ac86919395b..c87afe5de1dd8 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
@@ -2692,9 +2692,9 @@ int wx_set_features(struct net_device *netdev, netdev_features_t features)
 
 	netdev->features = features;
 
-	if (changed &
-	    (NETIF_F_HW_VLAN_CTAG_RX |
-	     NETIF_F_HW_VLAN_STAG_RX))
+	if (wx->mac.type == wx_mac_sp && changed & NETIF_F_HW_VLAN_CTAG_RX)
+		wx->do_reset(netdev);
+	else if (changed & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_FILTER))
 		wx_set_rx_mode(netdev);
 
 	return 0;
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_type.h b/drivers/net/ethernet/wangxun/libwx/wx_type.h
index 1fdeb464d5f4a..5aaf7b1fa2db9 100644
--- a/drivers/net/ethernet/wangxun/libwx/wx_type.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_type.h
@@ -982,8 +982,13 @@ struct wx_hw_stats {
 	u64 qmprc;
 };
 
+enum wx_state {
+	WX_STATE_RESETTING,
+	WX_STATE_NBITS,		/* must be last */
+};
 struct wx {
 	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
+	DECLARE_BITMAP(state, WX_STATE_NBITS);
 
 	void *priv;
 	u8 __iomem *hw_addr;
@@ -1071,6 +1076,8 @@ struct wx {
 	u64 hw_csum_rx_good;
 	u64 hw_csum_rx_error;
 	u64 alloc_rx_buff_failed;
+
+	void (*do_reset)(struct net_device *netdev);
 };
 
 #define WX_INTR_ALL (~0ULL)
@@ -1131,4 +1138,19 @@ static inline struct wx *phylink_to_wx(struct phylink_config *config)
 	return container_of(config, struct wx, phylink_config);
 }
 
+static inline int wx_set_state_reset(struct wx *wx)
+{
+	u8 timeout = 50;
+
+	while (test_and_set_bit(WX_STATE_RESETTING, wx->state)) {
+		timeout--;
+		if (!timeout)
+			return -EBUSY;
+
+		usleep_range(1000, 2000);
+	}
+
+	return 0;
+}
+
 #endif /* _WX_TYPE_H_ */
diff --git a/drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c b/drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c
index 786a652ae64f3..46a5a3e952021 100644
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c
@@ -52,7 +52,7 @@ static int ngbe_set_ringparam(struct net_device *netdev,
 	struct wx *wx = netdev_priv(netdev);
 	u32 new_rx_count, new_tx_count;
 	struct wx_ring *temp_ring;
-	int i;
+	int i, err = 0;
 
 	new_tx_count = clamp_t(u32, ring->tx_pending, WX_MIN_TXD, WX_MAX_TXD);
 	new_tx_count = ALIGN(new_tx_count, WX_REQ_TX_DESCRIPTOR_MULTIPLE);
@@ -64,6 +64,10 @@ static int ngbe_set_ringparam(struct net_device *netdev,
 	    new_rx_count == wx->rx_ring_count)
 		return 0;
 
+	err = wx_set_state_reset(wx);
+	if (err)
+		return err;
+
 	if (!netif_running(wx->netdev)) {
 		for (i = 0; i < wx->num_tx_queues; i++)
 			wx->tx_ring[i]->count = new_tx_count;
@@ -72,14 +76,16 @@ static int ngbe_set_ringparam(struct net_device *netdev,
 		wx->tx_ring_count = new_tx_count;
 		wx->rx_ring_count = new_rx_count;
 
-		return 0;
+		goto clear_reset;
 	}
 
 	/* allocate temporary buffer to store rings in */
 	i = max_t(int, wx->num_tx_queues, wx->num_rx_queues);
 	temp_ring = kvmalloc_array(i, sizeof(struct wx_ring), GFP_KERNEL);
-	if (!temp_ring)
-		return -ENOMEM;
+	if (!temp_ring) {
+		err = -ENOMEM;
+		goto clear_reset;
+	}
 
 	ngbe_down(wx);
 
@@ -89,7 +95,9 @@ static int ngbe_set_ringparam(struct net_device *netdev,
 	wx_configure(wx);
 	ngbe_up(wx);
 
-	return 0;
+clear_reset:
+	clear_bit(WX_STATE_RESETTING, wx->state);
+	return err;
 }
 
 static int ngbe_set_channels(struct net_device *dev,
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_ethtool.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_ethtool.c
index db675512ce4dc..31fde3fa7c6b5 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_ethtool.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_ethtool.c
@@ -19,7 +19,7 @@ static int txgbe_set_ringparam(struct net_device *netdev,
 	struct wx *wx = netdev_priv(netdev);
 	u32 new_rx_count, new_tx_count;
 	struct wx_ring *temp_ring;
-	int i;
+	int i, err = 0;
 
 	new_tx_count = clamp_t(u32, ring->tx_pending, WX_MIN_TXD, WX_MAX_TXD);
 	new_tx_count = ALIGN(new_tx_count, WX_REQ_TX_DESCRIPTOR_MULTIPLE);
@@ -31,6 +31,10 @@ static int txgbe_set_ringparam(struct net_device *netdev,
 	    new_rx_count == wx->rx_ring_count)
 		return 0;
 
+	err = wx_set_state_reset(wx);
+	if (err)
+		return err;
+
 	if (!netif_running(wx->netdev)) {
 		for (i = 0; i < wx->num_tx_queues; i++)
 			wx->tx_ring[i]->count = new_tx_count;
@@ -39,14 +43,16 @@ static int txgbe_set_ringparam(struct net_device *netdev,
 		wx->tx_ring_count = new_tx_count;
 		wx->rx_ring_count = new_rx_count;
 
-		return 0;
+		goto clear_reset;
 	}
 
 	/* allocate temporary buffer to store rings in */
 	i = max_t(int, wx->num_tx_queues, wx->num_rx_queues);
 	temp_ring = kvmalloc_array(i, sizeof(struct wx_ring), GFP_KERNEL);
-	if (!temp_ring)
-		return -ENOMEM;
+	if (!temp_ring) {
+		err = -ENOMEM;
+		goto clear_reset;
+	}
 
 	txgbe_down(wx);
 
@@ -55,7 +61,9 @@ static int txgbe_set_ringparam(struct net_device *netdev,
 
 	txgbe_up(wx);
 
-	return 0;
+clear_reset:
+	clear_bit(WX_STATE_RESETTING, wx->state);
+	return err;
 }
 
 static int txgbe_set_channels(struct net_device *dev,
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
index 5f2966b6b7f34..88ea20946e6ec 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
@@ -268,6 +268,8 @@ static int txgbe_sw_init(struct wx *wx)
 	wx->tx_work_limit = TXGBE_DEFAULT_TX_WORK;
 	wx->rx_work_limit = TXGBE_DEFAULT_RX_WORK;
 
+	wx->do_reset = txgbe_do_reset;
+
 	return 0;
 }
 
@@ -420,6 +422,34 @@ int txgbe_setup_tc(struct net_device *dev, u8 tc)
 	return 0;
 }
 
+static void txgbe_reinit_locked(struct wx *wx)
+{
+	int err = 0;
+
+	netif_trans_update(wx->netdev);
+
+	err = wx_set_state_reset(wx);
+	if (err) {
+		wx_err(wx, "wait device reset timeout\n");
+		return;
+	}
+
+	txgbe_down(wx);
+	txgbe_up(wx);
+
+	clear_bit(WX_STATE_RESETTING, wx->state);
+}
+
+void txgbe_do_reset(struct net_device *netdev)
+{
+	struct wx *wx = netdev_priv(netdev);
+
+	if (netif_running(netdev))
+		txgbe_reinit_locked(wx);
+	else
+		txgbe_reset(wx);
+}
+
 static const struct net_device_ops txgbe_netdev_ops = {
 	.ndo_open               = txgbe_open,
 	.ndo_stop               = txgbe_close,
diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
index 1b4ff50d58571..f434a7865cb7b 100644
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
@@ -134,6 +134,7 @@ extern char txgbe_driver_name[];
 void txgbe_down(struct wx *wx);
 void txgbe_up(struct wx *wx);
 int txgbe_setup_tc(struct net_device *dev, u8 tc);
+void txgbe_do_reset(struct net_device *netdev);
 
 #define NODE_PROP(_NAME, _PROP)			\
 	(const struct software_node) {		\




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