[PATCH net-next 2/4] alx: factor out part of the interrupt handler

[Tobias Regnery]

Factor out the handling of misc interrupts into a new function.
This function can be reused later for msi-x interrupts.

Signed-off-by: Tobias Regnery <tobias.regn...@gmail.com>
---
 drivers/net/ethernet/atheros/alx/main.c | 34 +++++++++++++++++++--------------
 1 file changed, 20 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/atheros/alx/main.c 
b/drivers/net/ethernet/atheros/alx/main.c
index 6dc1539205eb..b34f7b693cec 100644
--- a/drivers/net/ethernet/atheros/alx/main.c
+++ b/drivers/net/ethernet/atheros/alx/main.c
@@ -302,22 +302,15 @@ static int alx_poll(struct napi_struct *napi, int budget)
        return work;
 }
 
-static irqreturn_t alx_intr_handle(struct alx_priv *alx, u32 intr)
+static bool alx_intr_handle_misc(struct alx_priv *alx, u32 intr)
 {
        struct alx_hw *hw = &alx->hw;
-       bool write_int_mask = false;
-
-       spin_lock(&alx->irq_lock);
-
-       /* ACK interrupt */
-       alx_write_mem32(hw, ALX_ISR, intr | ALX_ISR_DIS);
-       intr &= alx->int_mask;
 
        if (intr & ALX_ISR_FATAL) {
                netif_warn(alx, hw, alx->dev,
                           "fatal interrupt 0x%x, resetting\n", intr);
                alx_schedule_reset(alx);
-               goto out;
+               return true;
        }
 
        if (intr & ALX_ISR_ALERT)
@@ -329,19 +322,32 @@ static irqreturn_t alx_intr_handle(struct alx_priv *alx, 
u32 intr)
                 * is cleared, the interrupt status could be cleared.
                 */
                alx->int_mask &= ~ALX_ISR_PHY;
-               write_int_mask = true;
+               alx_write_mem32(hw, ALX_IMR, alx->int_mask);
                alx_schedule_link_check(alx);
        }
 
+       return false;
+}
+
+static irqreturn_t alx_intr_handle(struct alx_priv *alx, u32 intr)
+{
+       struct alx_hw *hw = &alx->hw;
+
+       spin_lock(&alx->irq_lock);
+
+       /* ACK interrupt */
+       alx_write_mem32(hw, ALX_ISR, intr | ALX_ISR_DIS);
+       intr &= alx->int_mask;
+
+       if (alx_intr_handle_misc(alx, intr))
+               goto out;
+
        if (intr & (ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0)) {
                napi_schedule(&alx->napi);
                /* mask rx/tx interrupt, enable them when napi complete */
                alx->int_mask &= ~ALX_ISR_ALL_QUEUES;
-               write_int_mask = true;
-       }
-
-       if (write_int_mask)
                alx_write_mem32(hw, ALX_IMR, alx->int_mask);
+       }
 
        alx_write_mem32(hw, ALX_ISR, 0);
 
-- 
2.7.4