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authorAuke Kok <auke\-jan.h.kok@intel.com>2006-07-15 01:14:48 +0200
committerAuke Kok <juke-jan.h.kok@intel.com>2006-07-15 01:14:48 +0200
commiteb0f8054dd2e8b3cdf3af4771583b1dc2e1327cc (patch)
tree3b8acdf0f6ba42afcaceb3fa552d06ef44a01630 /drivers
parente1000: remove CRC bytes from measured packet length (diff)
downloadlinux-eb0f8054dd2e8b3cdf3af4771583b1dc2e1327cc.tar.xz
linux-eb0f8054dd2e8b3cdf3af4771583b1dc2e1327cc.zip
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 <jesse.brandeburg@intel.com> Signed-off-by: Auke Kok <auke.jan.h.kok@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/e1000/e1000.h3
-rw-r--r--drivers/net/e1000/e1000_main.c3
2 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h
index f411bbb44f86..d304297c496c 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 0074a3a506a5..154acb2cde91 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)))