gianfar: Merge Tx and Rx interrupt for scheduling clean up ring

No clean up function is executed in the interrupt context by this patch.

Signed-off-by: Dai Haruki <dai.haruki@freescale.com>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 19 insertions, 42 deletions

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 854f2ae3e56e..d243c9eea43a 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -1604,29 +1604,19 @@ static int gfar_clean_tx_ring(struct net_device *dev)
         return howmany;
 }
 
-/* Interrupt Handler for Transmit complete */
-static irqreturn_t gfar_transmit(int irq, void *dev_id)
+static void gfar_schedule_cleanup(struct net_device *dev)
 {
-        struct net_device *dev = (struct net_device *) dev_id;
         struct gfar_private *priv = netdev_priv(dev);
-
-        /* Clear IEVENT */
-        gfar_write(&priv->regs->ievent, IEVENT_TX_MASK);
-
-        /* Lock priv */
-        spin_lock(&priv->txlock);
-
-        gfar_clean_tx_ring(dev);
-
-        /* If we are coalescing the interrupts, reset the timer */
-        /* Otherwise, clear it */
-        if (likely(priv->txcoalescing)) {
-                gfar_write(&priv->regs->txic, 0);
-                gfar_write(&priv->regs->txic, priv->txic);
+        if (netif_rx_schedule_prep(dev, &priv->napi)) {
+                gfar_write(&priv->regs->imask, IMASK_RTX_DISABLED);
+                __netif_rx_schedule(dev, &priv->napi);
         }
+}
 
-        spin_unlock(&priv->txlock);
-
+/* Interrupt Handler for Transmit complete */
+static irqreturn_t gfar_transmit(int irq, void *dev_id)
+{
+        gfar_schedule_cleanup((struct net_device *)dev_id);
         return IRQ_HANDLED;
 }
 
@@ -1713,28 +1703,7 @@ static inline void count_errors(unsigned short status, struct net_device *dev)
 
 irqreturn_t gfar_receive(int irq, void *dev_id)
 {
-        struct net_device *dev = (struct net_device *) dev_id;
-        struct gfar_private *priv = netdev_priv(dev);
-        u32 tempval;
-
-        /* support NAPI */
-        /* Clear IEVENT, so interrupts aren't called again
-         * because of the packets that have already arrived */
-        gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK);
-
-        if (netif_rx_schedule_prep(dev, &priv->napi)) {
-                tempval = gfar_read(&priv->regs->imask);
-                tempval &= IMASK_RTX_DISABLED;
-                gfar_write(&priv->regs->imask, tempval);
-
-                __netif_rx_schedule(dev, &priv->napi);
-        } else {
-                if (netif_msg_rx_err(priv))
-                        printk(KERN_DEBUG "%s: receive called twice (%x)[%x]\n",
-                                dev->name, gfar_read(&priv->regs->ievent),
-                                gfar_read(&priv->regs->imask));
-        }
-
+        gfar_schedule_cleanup((struct net_device *)dev_id);
         return IRQ_HANDLED;
 }
 
@@ -1877,6 +1846,10 @@ static int gfar_poll(struct napi_struct *napi, int budget)
         int howmany;
         unsigned long flags;
 
+        /* Clear IEVENT, so interrupts aren't called again
+         * because of the packets that have already arrived */
+        gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK);
+
         /* If we fail to get the lock, don't bother with the TX BDs */
         if (spin_trylock_irqsave(&priv->txlock, flags)) {
                 gfar_clean_tx_ring(dev);
@@ -1899,6 +1872,10 @@ static int gfar_poll(struct napi_struct *napi, int budget)
                         gfar_write(&priv->regs->rxic, 0);
                         gfar_write(&priv->regs->rxic, priv->rxic);
                 }
+                if (likely(priv->txcoalescing)) {
+                        gfar_write(&priv->regs->txic, 0);
+                        gfar_write(&priv->regs->txic, priv->txic);
+                }
         }
 
         return howmany;
diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index 06bac34c3b52..b1a83344acc7 100644
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -251,7 +251,7 @@ extern const char gfar_driver_version[];
 #define IEVENT_FIQ              0x00000004
 #define IEVENT_DPE              0x00000002
 #define IEVENT_PERR             0x00000001
-#define IEVENT_RX_MASK          (IEVENT_RXB0 | IEVENT_RXF0)
+#define IEVENT_RX_MASK          (IEVENT_RXB0 | IEVENT_RXF0 | IEVENT_BSY)
 #define IEVENT_TX_MASK          (IEVENT_TXB | IEVENT_TXF)
 #define IEVENT_RTX_MASK         (IEVENT_RX_MASK | IEVENT_TX_MASK)
 #define IEVENT_ERR_MASK         \