From eb0f8054dd2e8b3cdf3af4771583b1dc2e1327cc Mon Sep 17 00:00:00 2001 From: Auke Kok Date: Fri, 14 Jul 2006 16:14:48 -0700 Subject: [PATCH] e1000: fix panic on large frame receive when mtu=default A panic was reported when receiving 1522 size packets if using the default MTU. we should set the initial rx buffer length to the value that e1000changemtu sets so that we can receive any packet that would not be dropped by LPE=0. Signed-off-by: Jesse Brandeburg Signed-off-by: Auke Kok --- drivers/net/e1000/e1000.h | 3 +++ drivers/net/e1000/e1000_main.c | 3 +-- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h index f411bbb44f..d304297c49 100644 --- a/drivers/net/e1000/e1000.h +++ b/drivers/net/e1000/e1000.h @@ -110,6 +110,9 @@ struct e1000_adapter; #define E1000_MIN_RXD 80 #define E1000_MAX_82544_RXD 4096 +/* this is the size past which hardware will drop packets when setting LPE=0 */ +#define MAXIMUM_ETHERNET_VLAN_SIZE 1522 + /* Supported Rx Buffer Sizes */ #define E1000_RXBUFFER_128 128 /* Used for packet split */ #define E1000_RXBUFFER_256 256 /* Used for packet split */ diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c index 0074a3a506..154acb2cde 100644 --- a/drivers/net/e1000/e1000_main.c +++ b/drivers/net/e1000/e1000_main.c @@ -1068,7 +1068,7 @@ e1000_sw_init(struct e1000_adapter *adapter) pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word); - adapter->rx_buffer_len = MAXIMUM_ETHERNET_FRAME_SIZE; + adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; adapter->rx_ps_bsize0 = E1000_RXBUFFER_128; hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; @@ -3148,7 +3148,6 @@ e1000_change_mtu(struct net_device *netdev, int new_mtu) adapter->rx_buffer_len = E1000_RXBUFFER_16384; /* adjust allocation if LPE protects us, and we aren't using SBP */ -#define MAXIMUM_ETHERNET_VLAN_SIZE 1522 if (!adapter->hw.tbi_compatibility_on && ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) || (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE))) -- 2.39.5