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path: root/drivers/net/e1000e/netdev.c
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Diffstat (limited to 'drivers/net/e1000e/netdev.c')
-rw-r--r--drivers/net/e1000e/netdev.c29
1 files changed, 19 insertions, 10 deletions
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index 2b8ef44bd2b1..e561d15c3eb1 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -2704,6 +2704,16 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter)
u32 psrctl = 0;
u32 pages = 0;
+ /* Workaround Si errata on 82579 - configure jumbo frame flow */
+ if (hw->mac.type == e1000_pch2lan) {
+ s32 ret_val;
+
+ if (adapter->netdev->mtu > ETH_DATA_LEN)
+ ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, true);
+ else
+ ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, false);
+ }
+
/* Program MC offset vector base */
rctl = er32(RCTL);
rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
@@ -2744,16 +2754,6 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter)
e1e_wphy(hw, 22, phy_data);
}
- /* Workaround Si errata on 82579 - configure jumbo frame flow */
- if (hw->mac.type == e1000_pch2lan) {
- s32 ret_val;
-
- if (rctl & E1000_RCTL_LPE)
- ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, true);
- else
- ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, false);
- }
-
/* Setup buffer sizes */
rctl &= ~E1000_RCTL_SZ_4096;
rctl |= E1000_RCTL_BSEX;
@@ -4833,6 +4833,15 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
return -EINVAL;
}
+ /* Jumbo frame workaround on 82579 requires CRC be stripped */
+ if ((adapter->hw.mac.type == e1000_pch2lan) &&
+ !(adapter->flags2 & FLAG2_CRC_STRIPPING) &&
+ (new_mtu > ETH_DATA_LEN)) {
+ e_err("Jumbo Frames not supported on 82579 when CRC "
+ "stripping is disabled.\n");
+ return -EINVAL;
+ }
+
/* 82573 Errata 17 */
if (((adapter->hw.mac.type == e1000_82573) ||
(adapter->hw.mac.type == e1000_82574)) &&
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