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| author | Divy Le Ray <divy@chelsio.com> | 2010-02-13 09:44:30 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-15 21:49:48 -0800 |
| commit | 38a8fc0fcf86f131f8bddf3787f9dfa7325bd981 (patch) | |
| tree | 7cb8365ca766c7cbe1092f365ed50f12fdc0c792 /drivers/net/cxgb3 | |
| parent | d41a5b7da223f7a80844fb3e948e8d5e6181f214 (diff) | |
| download | linux-38a8fc0fcf86f131f8bddf3787f9dfa7325bd981.tar.gz linux-38a8fc0fcf86f131f8bddf3787f9dfa7325bd981.tar.bz2 linux-38a8fc0fcf86f131f8bddf3787f9dfa7325bd981.zip | |
cxgb3: FIx VLAN over Jumbo frames
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/cxgb3')
| -rw-r--r-- | 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 0109ee4f2f91..0c08de5d09fd 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); |