Messages in this thread Patch in this message | | | From | Divy Le Ray <> | Subject | [PATCH net-next-2.6 1/2] cxgb3: FIx VLAN over Jumbo frames | Date | Sat, 13 Feb 2010 11:44:30 -0800 |
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From: Divy Le Ray <divy@chelsio.com>
The mac is expected to auto-inflate the Maximum Frame size for VLAN tagged frames. It however does not work with jumbo frames. Work around the bug adding 4 to the Maximum Frame for MTUs greater than 1536.
Signed-off-by: Divy Le Ray <divy@chelsio.com> ---
drivers/net/cxgb3/xgmac.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/drivers/net/cxgb3/xgmac.c b/drivers/net/cxgb3/xgmac.c index 0109ee4..0c08de5 100644 --- a/drivers/net/cxgb3/xgmac.c +++ b/drivers/net/cxgb3/xgmac.c @@ -353,6 +353,9 @@ int t3_mac_set_mtu(struct cmac *mac, unsigned int mtu) * packet size register includes header, but not FCS. */ mtu += 14; + if (mtu > 1536) + mtu += 4; + if (mtu > MAX_FRAME_SIZE - 4) return -EINVAL; t3_write_reg(adap, A_XGM_RX_MAX_PKT_SIZE + mac->offset, mtu);
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