net:stmmac: fix memleak in the open method

This patch is to fix a memory leak in the open method, it reviews error
conditions freeing the resources previously allocated and not freed in
cased of DMA failure.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index f2d283d..f2ccb36 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1552,7 +1552,7 @@ static int stmmac_open(struct net_device *dev)
                if (ret) {
                        pr_err("%s: Cannot attach to PHY (error: %d)\n",
                               __func__, ret);
-                       goto open_error;
+                       goto phy_error;
                }
        }
 
@@ -1566,7 +1566,7 @@ static int stmmac_open(struct net_device *dev)
        ret = stmmac_init_dma_engine(priv);
        if (ret < 0) {
                pr_err("%s: DMA initialization failed\n", __func__);
-               goto open_error;
+               goto init_error;
        }
 
        /* Copy the MAC addr into the HW  */
@@ -1585,7 +1585,7 @@ static int stmmac_open(struct net_device *dev)
        if (unlikely(ret < 0)) {
                pr_err("%s: ERROR: allocating the IRQ %d (error: %d)\n",
                       __func__, dev->irq, ret);
-               goto open_error;
+               goto init_error;
        }
 
        /* Request the Wake IRQ in case of another line is used for WoL */
@@ -1595,7 +1595,7 @@ static int stmmac_open(struct net_device *dev)
                if (unlikely(ret < 0)) {
                        pr_err("%s: ERROR: allocating the WoL IRQ %d (%d)\n",
                               __func__, priv->wol_irq, ret);
-                       goto open_error_wolirq;
+                       goto wolirq_error;
                }
        }
 
@@ -1606,7 +1606,7 @@ static int stmmac_open(struct net_device *dev)
                if (unlikely(ret < 0)) {
                        pr_err("%s: ERROR: allocating the LPI IRQ %d (%d)\n",
                               __func__, priv->lpi_irq, ret);
-                       goto open_error_lpiirq;
+                       goto lpiirq_error;
                }
        }
 
@@ -1664,17 +1664,17 @@ static int stmmac_open(struct net_device *dev)
 
        return 0;
 
-open_error_lpiirq:
+lpiirq_error:
        if (priv->wol_irq != dev->irq)
                free_irq(priv->wol_irq, dev);
-
-open_error_wolirq:
+wolirq_error:
        free_irq(dev->irq, dev);
 
-open_error:
+init_error:
+       free_dma_desc_resources(priv);
        if (priv->phydev)
                phy_disconnect(priv->phydev);
-
+phy_error:
        clk_disable_unprepare(priv->stmmac_clk);
 
        return ret;