net: gemini: Fix memory leak in gmac_setup_txqs

In the implementation of gmac_setup_txqs() the allocated desc_ring is
leaked if TX queue base is not aligned. Release it via
dma_free_coherent.

Fixes: 4d5ae32f5e1e ("net: ethernet: Add a driver for Gemini gigabit ethernet")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/cortina/gemini.c b/drivers/net/ethernet/cortina/gemini.c
index a8f4c69..2814b96 100644 (file)
--- a/drivers/net/ethernet/cortina/gemini.c
+++ b/drivers/net/ethernet/cortina/gemini.c
@@ -576,6 +576,8 @@ static int gmac_setup_txqs(struct net_device *netdev)
 
        if (port->txq_dma_base & ~DMA_Q_BASE_MASK) {
                dev_warn(geth->dev, "TX queue base is not aligned\n");
+               dma_free_coherent(geth->dev, len * sizeof(*desc_ring),
+                                 desc_ring, port->txq_dma_base);
                kfree(skb_tab);
                return -ENOMEM;
        }