netdev - [PATCH 4/5] [E1000]: [VLAN] Turn off the HW vlan filter if promisc

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Date:	Fri, 11 Apr 2008 22:58:51 +0900
From:	Joonwoo Park <joonwpark81@...il.com>
To:	auke-jan.h.kok@...el.com
Cc:	kaber@...sh.net, jeff@...zik.org, netdev@...r.kernel.org
Subject: [PATCH 4/5] [E1000]: [VLAN] Turn off the HW vlan filter if promisc

If the netdev goes into mode promiscuous, receive all of the packets on
the wire without HW filtering, those packets will be processed as type
PACKET_OTHERHOST.

Signed-off-by: Joonwoo Park <joonwpark81@...il.com>
---
 drivers/net/e1000/e1000_main.c |   19 ++++++++++++++-----
 1 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 0991648..61965c2 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -2495,7 +2495,7 @@ e1000_set_rx_mode(struct net_device *netdev)
 	struct e1000_hw *hw = &adapter->hw;
 	struct dev_addr_list *uc_ptr;
 	struct dev_addr_list *mc_ptr;
-	uint32_t rctl;
+	uint32_t rctl, ctrl;
 	uint32_t hash_value;
 	int i, rar_entries = E1000_RAR_ENTRIES;
 	int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
@@ -2512,13 +2512,19 @@ e1000_set_rx_mode(struct net_device *netdev)
 	/* Check for Promiscuous and All Multicast modes */
 
 	rctl = E1000_READ_REG(hw, RCTL);
+	ctrl = E1000_READ_REG(hw, CTRL);
 
 	if (netdev->flags & IFF_PROMISC) {
 		rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
-	} else if (netdev->flags & IFF_ALLMULTI) {
-		rctl |= E1000_RCTL_MPE;
+		rctl &= ~E1000_RCTL_VFE;
 	} else {
-		rctl &= ~E1000_RCTL_MPE;
+		if (ctrl & E1000_CTRL_VME &&
+		    adapter->hw.mac_type != e1000_ich8lan)
+			rctl |= E1000_RCTL_VFE;
+		if (netdev->flags & IFF_ALLMULTI)
+			rctl |= E1000_RCTL_MPE;
+		else
+			rctl &= ~E1000_RCTL_MPE;
 	}
 
 	uc_ptr = NULL;
@@ -5013,7 +5019,10 @@ e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
 		if (adapter->hw.mac_type != e1000_ich8lan) {
 			/* enable VLAN receive filtering */
 			rctl = E1000_READ_REG(&adapter->hw, RCTL);
-			rctl |= E1000_RCTL_VFE;
+			if (netdev->flags & IFF_PROMISC)
+				rctl &= ~E1000_RCTL_VFE;
+			else
+				rctl |= E1000_RCTL_VFE;
 			rctl &= ~E1000_RCTL_CFIEN;
 			E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
 			e1000_update_mng_vlan(adapter);
-- 
1.5.4.3


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