net: fec: remove last_bdp from fec_enet_txq_xmit_frame()

The last_bdp is initialized to bdp, and both last_bdp and bdp are
not changed. That is to say that last_bdp and bdp are always equal.
So bdp can be used directly.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230529022615.669589-1-wei.fang@nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 632bb4d589d764e710ac0d2666fed508731b35dd..4d37a811ae15489541fafd7a998992e6bfa03c3b 100644 (file)
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -3770,7 +3770,7 @@ static int fec_enet_txq_xmit_frame(struct fec_enet_private *fep,
                                   struct xdp_frame *frame)
 {
        unsigned int index, status, estatus;
-       struct bufdesc *bdp, *last_bdp;
+       struct bufdesc *bdp;
        dma_addr_t dma_addr;
        int entries_free;
 
@@ -3782,7 +3782,6 @@ static int fec_enet_txq_xmit_frame(struct fec_enet_private *fep,
 
        /* Fill in a Tx ring entry */
        bdp = txq->bd.cur;
-       last_bdp = bdp;
        status = fec16_to_cpu(bdp->cbd_sc);
        status &= ~BD_ENET_TX_STATS;
 
@@ -3810,7 +3809,6 @@ static int fec_enet_txq_xmit_frame(struct fec_enet_private *fep,
                ebdp->cbd_esc = cpu_to_fec32(estatus);
        }
 
-       index = fec_enet_get_bd_index(last_bdp, &txq->bd);
        txq->tx_skbuff[index] = NULL;
 
        /* Make sure the updates to rest of the descriptor are performed before
@@ -3825,7 +3823,7 @@ static int fec_enet_txq_xmit_frame(struct fec_enet_private *fep,
        bdp->cbd_sc = cpu_to_fec16(status);
 
        /* If this was the last BD in the ring, start at the beginning again. */
-       bdp = fec_enet_get_nextdesc(last_bdp, &txq->bd);
+       bdp = fec_enet_get_nextdesc(bdp, &txq->bd);
 
        /* Make sure the update to bdp are performed before txq->bd.cur. */
        dma_wmb();