From 493004d04f56fd7d642bdbb2938e17e5f7d622d1 Mon Sep 17 00:00:00 2001 From: David Ertman Date: Fri, 4 Jul 2014 01:44:32 +0000 Subject: [PATCH] e1000e: Fix CRC errors with jumbo traffic Modifying the jumbo frame workaround for 82579, i217 and i218 client parts to increase the gap between the read and write pointers in the Tx FIFO. Signed-off-by: Dave Ertman Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/e1000e/defines.h | 1 + drivers/net/ethernet/intel/e1000e/ich8lan.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/e1000e/defines.h b/drivers/net/ethernet/intel/e1000e/defines.h index d18e89212575..bb7ab3c321d6 100644 --- a/drivers/net/ethernet/intel/e1000e/defines.h +++ b/drivers/net/ethernet/intel/e1000e/defines.h @@ -342,6 +342,7 @@ #define E1000_TIPG_IPGR2_SHIFT 20 #define MAX_JUMBO_FRAME_SIZE 0x3F00 +#define E1000_TX_PTR_GAP 0x1F /* Extended Configuration Control and Size */ #define E1000_EXTCNF_CTRL_MDIO_SW_OWNERSHIP 0x00000020 diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c index f236861c2a31..8dbcdc81104e 100644 --- a/drivers/net/ethernet/intel/e1000e/ich8lan.c +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c @@ -2444,7 +2444,7 @@ s32 e1000_lv_jumbo_workaround_ich8lan(struct e1000_hw *hw, bool enable) return ret_val; e1e_rphy(hw, PHY_REG(776, 20), &data); data &= ~(0x3FF << 2); - data |= (0x1A << 2); + data |= (E1000_TX_PTR_GAP << 2); ret_val = e1e_wphy(hw, PHY_REG(776, 20), data); if (ret_val) return ret_val; -- 2.11.0