From 249d71d694ee3a6c02067235995d6d4258d364f3 Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Wed, 27 Sep 2006 12:53:45 -0700 Subject: [PATCH] e1000: Jumbo frames fixes for 82573 Disable jumbo frames for 82573L alltogether and when ASPM is enabled since the hardware has problems with it. For the NICs that do support this in the 82573 series we set ERT_2048 to attempt to receive as much traffic as early as we can. Signed-off-by: Bruce Allan Signed-off-by: Auke Kok --- drivers/net/e1000/e1000_main.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c index e55fb9cc41c3..a1f5b0605363 100644 --- a/drivers/net/e1000/e1000_main.c +++ b/drivers/net/e1000/e1000_main.c @@ -3138,11 +3138,13 @@ e1000_change_mtu(struct net_device *netdev, int new_mtu) } break; case e1000_82573: - /* only enable jumbo frames if ASPM is disabled completely - * this means both bits must be zero in 0x1A bits 3:2 */ + /* Jumbo Frames not supported if: + * - this is not an 82573L device + * - ASPM is enabled in any way (0x1A bits 3:2) */ e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1, &eeprom_data); - if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) { + if ((adapter->hw.device_id != E1000_DEV_ID_82573L) || + (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) { if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) { DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n"); @@ -3150,6 +3152,8 @@ e1000_change_mtu(struct net_device *netdev, int new_mtu) } break; } + /* ERT will be enabled later to enable wire speed receives */ + /* fall through to get support */ case e1000_82571: case e1000_82572: -- 2.20.1