stmmac: request_irq when use an ext wake irq line (v2)

In case of we use an external Wake-Up IRQ line
(priv->wol_irq != dev->irq) we need to invoke the
request_irq.

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

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 96fa2da30763..970a3f415244 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1047,6 +1047,17 @@ static int stmmac_open(struct net_device *dev)
                 goto open_error;
         }
 
+        /* Request the Wake IRQ in case of another line is used for WoL */
+        if (priv->wol_irq != dev->irq) {
+                ret = request_irq(priv->wol_irq, stmmac_interrupt,
+                                  IRQF_SHARED, dev->name, dev);
+                if (unlikely(ret < 0)) {
+                        pr_err("%s: ERROR: allocating the ext WoL IRQ %d "
+                               "(error: %d)\n", __func__, priv->wol_irq, ret);
+                        goto open_error_wolirq;
+                }
+        }
+
         /* Enable the MAC Rx/Tx */
         stmmac_set_mac(priv->ioaddr, true);
 
@@ -1087,6 +1098,9 @@ static int stmmac_open(struct net_device *dev)
 
         return 0;
 
+open_error_wolirq:
+        free_irq(dev->irq, dev);
+
 open_error:
 #ifdef CONFIG_STMMAC_TIMER
         kfree(priv->tm);
@@ -1127,6 +1141,8 @@ static int stmmac_release(struct net_device *dev)
 
         /* Free the IRQ lines */
         free_irq(dev->irq, dev);
+        if (priv->wol_irq != dev->irq)
+                free_irq(priv->wol_irq, dev);
 
         /* Stop TX/RX DMA and clear the descriptors */
         priv->hw->dma->stop_tx(priv->ioaddr);