net: enetc: create enetc_dma_free_bdr()

This is a refactoring change which introduces the opposite function of
enetc_dma_alloc_bdr().

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c
index 4f8c949..ca1dacc 100644 (file)
--- a/drivers/net/ethernet/freescale/enetc/enetc.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc.c
@@ -1732,6 +1732,13 @@ static int enetc_dma_alloc_bdr(struct enetc_bdr *r, size_t bd_size)
        return 0;
 }
 
+static void enetc_dma_free_bdr(struct enetc_bdr *r, size_t bd_size)
+{
+       dma_free_coherent(r->dev, r->bd_count * bd_size, r->bd_base,
+                         r->bd_dma_base);
+       r->bd_base = NULL;
+}
+
 static int enetc_alloc_txbdr(struct enetc_bdr *txr)
 {
        int err;
@@ -1756,9 +1763,7 @@ static int enetc_alloc_txbdr(struct enetc_bdr *txr)
        return 0;
 
 err_alloc_tso:
-       dma_free_coherent(txr->dev, txr->bd_count * sizeof(union enetc_tx_bd),
-                         txr->bd_base, txr->bd_dma_base);
-       txr->bd_base = NULL;
+       enetc_dma_free_bdr(txr, sizeof(union enetc_tx_bd));
 err_alloc_bdr:
        vfree(txr->tx_swbd);
        txr->tx_swbd = NULL;
@@ -1768,19 +1773,16 @@ err_alloc_bdr:
 
 static void enetc_free_txbdr(struct enetc_bdr *txr)
 {
-       int size, i;
+       int i;
 
        for (i = 0; i < txr->bd_count; i++)
                enetc_free_tx_frame(txr, &txr->tx_swbd[i]);
 
-       size = txr->bd_count * sizeof(union enetc_tx_bd);
-
        dma_free_coherent(txr->dev, txr->bd_count * TSO_HEADER_SIZE,
                          txr->tso_headers, txr->tso_headers_dma);
        txr->tso_headers = NULL;
 
-       dma_free_coherent(txr->dev, size, txr->bd_base, txr->bd_dma_base);
-       txr->bd_base = NULL;
+       enetc_dma_free_bdr(txr, sizeof(union enetc_tx_bd));
 
        vfree(txr->tx_swbd);
        txr->tx_swbd = NULL;
@@ -1839,12 +1841,7 @@ static int enetc_alloc_rxbdr(struct enetc_bdr *rxr, bool extended)
 
 static void enetc_free_rxbdr(struct enetc_bdr *rxr)
 {
-       int size;
-
-       size = rxr->bd_count * sizeof(union enetc_rx_bd);
-
-       dma_free_coherent(rxr->dev, size, rxr->bd_base, rxr->bd_dma_base);
-       rxr->bd_base = NULL;
+       enetc_dma_free_bdr(rxr, sizeof(union enetc_rx_bd));
 
        vfree(rxr->rx_swbd);
        rxr->rx_swbd = NULL;