From ff886dfce2bdacbe71583ec973cec117973d8859 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Sat, 11 Jun 2011 01:45:13 +0000 Subject: ixgbe: Pass staterr instead of re-reading status and error bits from descriptor This change is meant to address possible race conditions from the status and error bits on the RX descriptors being re-read by multiple functions in the RX cleanup path. To resolve this I have added code that will pass the staterr value to those functions. Signed-off-by: Alexander Duyck Tested-by: Ross Brattain Signed-off-by: Jeff Kirsher --- drivers/net/ixgbe/ixgbe_main.c | 39 ++++++++++++++++++++++++++++----------- 1 file changed, 28 insertions(+), 11 deletions(-) (limited to 'drivers/net/ixgbe/ixgbe_main.c') diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index 298c95b1480..a222af378a3 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -1038,6 +1038,24 @@ static inline void ixgbe_rx_hash(union ixgbe_adv_rx_desc *rx_desc, skb->rxhash = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss); } +/** + * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type + * @adapter: address of board private structure + * @rx_desc: advanced rx descriptor + * + * Returns : true if it is FCoE pkt + */ +static inline bool ixgbe_rx_is_fcoe(struct ixgbe_adapter *adapter, + union ixgbe_adv_rx_desc *rx_desc) +{ + __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; + + return (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) && + ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) == + (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE << + IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT))); +} + /** * ixgbe_receive_skb - Send a completed packet up the stack * @adapter: board private structure @@ -1070,14 +1088,14 @@ static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector, * @adapter: address of board private structure * @status_err: hardware indication of status of receive * @skb: skb currently being received and modified + * @status_err: status error value of last descriptor in packet **/ static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter, union ixgbe_adv_rx_desc *rx_desc, - struct sk_buff *skb) + struct sk_buff *skb, + u32 status_err) { - u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error); - - skb_checksum_none_assert(skb); + skb->ip_summed = CHECKSUM_NONE; /* Rx csum disabled */ if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED)) @@ -1421,14 +1439,12 @@ static void ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector, } /* ERR_MASK will only have valid bits if EOP set */ - if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) { - /* trim packet back to size 0 and recycle it */ - __pskb_trim(skb, 0); - rx_buffer_info->skb = skb; + if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) { + dev_kfree_skb_any(skb); goto next_desc; } - ixgbe_rx_checksum(adapter, rx_desc, skb); + ixgbe_rx_checksum(adapter, rx_desc, skb, staterr); if (adapter->netdev->features & NETIF_F_RXHASH) ixgbe_rx_hash(rx_desc, skb); @@ -1439,8 +1455,9 @@ static void ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector, skb->protocol = eth_type_trans(skb, rx_ring->netdev); #ifdef IXGBE_FCOE /* if ddp, not passing to ULD unless for FCP_RSP or error */ - if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) { - ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb); + if (ixgbe_rx_is_fcoe(adapter, rx_desc)) { + ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb, + staterr); if (!ddp_bytes) goto next_desc; } -- cgit v1.2.3-70-g09d2