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authorSathya Perla <sathyap@serverengines.com>2010-02-17 01:35:26 +0000
committerDavid S. Miller <davem@davemloft.net>2010-02-17 13:35:39 -0800
commit89420424fce28769c338909393518087befe8b37 (patch)
tree1f3f40831ff18d40200bb8ff808d87ab5dbe9f48 /drivers/net/benet
parent7a1e9b2059d147461cff3dfbabbfb43f296a1eef (diff)
be2net: fix rx-path to ignore a flush completion
The flush compl (compl with numfrags == 0; no data) is rcvd from hw to indicate completion of RXQ destory operation. Fix the RX path to not process it as RX data. Signed-off-by: Sathya Perla <sathyap@serverengines.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/benet')
-rw-r--r--drivers/net/benet/be_main.c23
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index 43dbe288a5ef..2c3deadd2d83 100644
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -680,17 +680,17 @@ static void be_rx_compl_discard(struct be_adapter *adapter,
* indicated by rxcp.
*/
static void skb_fill_rx_data(struct be_adapter *adapter,
- struct sk_buff *skb, struct be_eth_rx_compl *rxcp)
+ struct sk_buff *skb, struct be_eth_rx_compl *rxcp,
+ u16 num_rcvd)
{
struct be_queue_info *rxq = &adapter->rx_obj.q;
struct be_rx_page_info *page_info;
- u16 rxq_idx, i, num_rcvd, j;
+ u16 rxq_idx, i, j;
u32 pktsize, hdr_len, curr_frag_len, size;
u8 *start;
rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp);
pktsize = AMAP_GET_BITS(struct amap_eth_rx_compl, pktsize, rxcp);
- num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp);
page_info = get_rx_page_info(adapter, rxq_idx);
@@ -766,8 +766,14 @@ static void be_rx_compl_process(struct be_adapter *adapter,
{
struct sk_buff *skb;
u32 vlanf, vid;
+ u16 num_rcvd;
u8 vtm;
+ num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp);
+ /* Is it a flush compl that has no data */
+ if (unlikely(num_rcvd == 0))
+ return;
+
skb = netdev_alloc_skb_ip_align(adapter->netdev, BE_HDR_LEN);
if (unlikely(!skb)) {
if (net_ratelimit())
@@ -776,7 +782,7 @@ static void be_rx_compl_process(struct be_adapter *adapter,
return;
}
- skb_fill_rx_data(adapter, skb, rxcp);
+ skb_fill_rx_data(adapter, skb, rxcp, num_rcvd);
if (do_pkt_csum(rxcp, adapter->rx_csum))
skb->ip_summed = CHECKSUM_NONE;
@@ -823,6 +829,10 @@ static void be_rx_compl_process_gro(struct be_adapter *adapter,
u8 vtm;
num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp);
+ /* Is it a flush compl that has no data */
+ if (unlikely(num_rcvd == 0))
+ return;
+
pkt_size = AMAP_GET_BITS(struct amap_eth_rx_compl, pktsize, rxcp);
vlanf = AMAP_GET_BITS(struct amap_eth_rx_compl, vtp, rxcp);
rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp);
@@ -1273,6 +1283,11 @@ static void be_rx_queues_destroy(struct be_adapter *adapter)
q = &adapter->rx_obj.q;
if (q->created) {
be_cmd_q_destroy(adapter, q, QTYPE_RXQ);
+
+ /* After the rxq is invalidated, wait for a grace time
+ * of 1ms for all dma to end and the flush compl to arrive
+ */
+ mdelay(1);
be_rx_q_clean(adapter);
}
be_queue_free(adapter, q);