net/bnxt: fix size of Tx ring in HW
authorAjit Khaparde <ajit.khaparde@broadcom.com>
Fri, 26 Jan 2018 17:31:54 +0000 (09:31 -0800)
committerFerruh Yigit <ferruh.yigit@intel.com>
Mon, 29 Jan 2018 09:04:28 +0000 (10:04 +0100)
During Tx ring allocation, the actual ring size configured in the HW
ends up being twice the number of txd parameter specified to the driver.
The power of 2 ring size wrongly adds a +1 while sending the ring
create command to the FW.

Fixes: 6eb3cc2294fd ("net/bnxt: add initial Tx code")
Cc: stable@dpdk.org
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
drivers/net/bnxt/bnxt_txr.c

index ac77434..2f2c871 100644 (file)
@@ -101,7 +101,7 @@ int bnxt_init_tx_ring_struct(struct bnxt_tx_queue *txq, unsigned int socket_id)
        if (ring == NULL)
                return -ENOMEM;
        txr->tx_ring_struct = ring;
-       ring->ring_size = rte_align32pow2(txq->nb_tx_desc + 1);
+       ring->ring_size = rte_align32pow2(txq->nb_tx_desc);
        ring->ring_mask = ring->ring_size - 1;
        ring->bd = (void *)txr->tx_desc_ring;
        ring->bd_dma = txr->tx_desc_mapping;