be2net: Fix early reset of rx-completion

be_rx_compl_get() must not reset(via the valid word) the rx_compl as the rx_compl is not processed yet; it must be reset after it is processed.

Signed-off-by: Sathya Perla <sathyap@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index 5aadd71d4613c97b74739653f2d63f85dbaca9b2..86f70af93d605432dda7d77e57da7dc3cbd6ba6c 100644 (file)
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -876,12 +876,19 @@ static struct be_eth_rx_compl *be_rx_compl_get(struct be_adapter *adapter)
 
        be_dws_le_to_cpu(rxcp, sizeof(*rxcp));
 
-       rxcp->dw[offsetof(struct amap_eth_rx_compl, valid) / 32] = 0;
-
        queue_tail_inc(&adapter->rx_obj.cq);
        return rxcp;
 }
 
+/* To reset the valid bit, we need to reset the whole word as
+ * when walking the queue the valid entries are little-endian
+ * and invalid entries are host endian
+ */
+static inline void be_rx_compl_reset(struct be_eth_rx_compl *rxcp)
+{
+       rxcp->dw[offsetof(struct amap_eth_rx_compl, valid) / 32] = 0;
+}
+
 static inline struct page *be_alloc_pages(u32 size)
 {
        gfp_t alloc_flags = GFP_ATOMIC;
@@ -1013,6 +1020,7 @@ static void be_rx_q_clean(struct be_adapter *adapter)
        /* First cleanup pending rx completions */
        while ((rxcp = be_rx_compl_get(adapter)) != NULL) {
                be_rx_compl_discard(adapter, rxcp);
+               be_rx_compl_reset(rxcp);
                be_cq_notify(&adapter->ctrl, rx_cq->id, true, 1);
        }
 
@@ -1294,6 +1302,8 @@ int be_poll_rx(struct napi_struct *napi, int budget)
                        be_rx_compl_process_lro(adapter, rxcp);
                else
                        be_rx_compl_process(adapter, rxcp);
+
+               be_rx_compl_reset(rxcp);
        }
 
        lro_flush_all(&adapter->rx_obj.lro_mgr);