diff options
| author |   Tushar Dave <tushar.n.dave@intel.com> | 2012-09-14 02:21:37 +0000 |
|---|---|---|
| committer |   Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2012-10-23 01:02:19 -0700 |
| commit | 6e97c170db3878695cb48b5021fffe442ec0aeb0 (patch) | |
| tree | d89a13b90c5c8e1033f6ade44e8e379a31a7854a /drivers/net/ethernet | |
| parent | Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next (diff) | |
| download | linux-dev-6e97c170db3878695cb48b5021fffe442ec0aeb0.tar.xz linux-dev-6e97c170db3878695cb48b5021fffe442ec0aeb0.zip | |
e1000e: Minimum packet size must be 17 bytes
This is a HW requirement. Although a buffer as short as 1 byte is allowed,
the total length of packet before, padding and CRC insertion, must be at
least 17 bytes. So pad all small packets manually up to 17 bytes before
delivering them to HW.
Signed-off-by: Tushar Dave <tushar.n.dave@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/netdev.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index f444eb0b76d8..dadb13be479a 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -5067,6 +5067,17 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, return NETDEV_TX_OK; } + /* + * The minimum packet size with TCTL.PSP set is 17 bytes so + * pad skb in order to meet this minimum size requirement + */ + if (unlikely(skb->len < 17)) { + if (skb_pad(skb, 17 - skb->len)) + return NETDEV_TX_OK; + skb->len = 17; + skb_set_tail_pointer(skb, 17); + } + mss = skb_shinfo(skb)->gso_size; if (mss) { u8 hdr_len; |