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| author | Ayyappan Veeraiyan <ayyappan.veeraiyan@intel.com> | 2008-02-01 15:59:09 -0800 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2008-02-05 13:31:35 -0500 |
| commit | e59bd25d579c143f1b93a33d3243d67abbb15abe (patch) | |
| tree | 69c0f6a7c074c2dd4fe64d032f17517e212853cc /drivers/net/ixgbe | |
| parent | 5eba3699a3b2e0d7afa0d4594980bafb1e47e2b4 (diff) | |
| download | linux-e59bd25d579c143f1b93a33d3243d67abbb15abe.tar.gz linux-e59bd25d579c143f1b93a33d3243d67abbb15abe.tar.bz2 linux-e59bd25d579c143f1b93a33d3243d67abbb15abe.zip | |
ixgbe: properly return CHECKSUM_NONE, cleanup csum code
We were not returning CHECKSUM_NONE in a lot of cases which is
wrong. Move common exit points in this function and error code
up before the actual work in this function.
Signed-off-by: Ayyappan Veeraiyan <ayyappan.veeraiyan@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/ixgbe')
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_main.c | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index c814d9bfbca7..ee5ee10c918f 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -304,25 +304,40 @@ static void ixgbe_receive_skb(struct ixgbe_adapter *adapter, } } +/** + * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum + * @adapter: address of board private structure + * @status_err: hardware indication of status of receive + * @skb: skb currently being received and modified + **/ static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter, u32 status_err, struct sk_buff *skb) { skb->ip_summed = CHECKSUM_NONE; - /* Ignore Checksum bit is set */ + /* Ignore Checksum bit is set, or rx csum disabled */ if ((status_err & IXGBE_RXD_STAT_IXSM) || - !(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED)) + !(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED)) return; - /* TCP/UDP checksum error bit is set */ - if (status_err & (IXGBE_RXDADV_ERR_TCPE | IXGBE_RXDADV_ERR_IPE)) { - /* let the stack verify checksum errors */ + + /* if IP and error */ + if ((status_err & IXGBE_RXD_STAT_IPCS) && + (status_err & IXGBE_RXDADV_ERR_IPE)) { adapter->hw_csum_rx_error++; return; } + + if (!(status_err & IXGBE_RXD_STAT_L4CS)) + return; + + if (status_err & IXGBE_RXDADV_ERR_TCPE) { + adapter->hw_csum_rx_error++; + return; + } + /* It must be a TCP or UDP packet with a valid checksum */ - if (status_err & (IXGBE_RXD_STAT_L4CS | IXGBE_RXD_STAT_UDPCS)) - skb->ip_summed = CHECKSUM_UNNECESSARY; + skb->ip_summed = CHECKSUM_UNNECESSARY; adapter->hw_csum_rx_good++; } |