forcedeth: remove overhead

This patch removes unnecessary overhead code. Firstly, there is no nead
to mask off unwanted interrupts as we will be checking against the
irqmask field anyways. Secondly, there has been no value in last few
years from detecting error or unknown interrupts.
Signed-off-by: NAyaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/forcedeth.c

@@ -120,10 +120,6 @@ enum {
 #define NVREG_IRQ_RX_ALL		(NVREG_IRQ_RX_ERROR|NVREG_IRQ_RX|NVREG_IRQ_RX_NOBUF|NVREG_IRQ_RX_FORCED)
 #define NVREG_IRQ_OTHER			(NVREG_IRQ_TIMER|NVREG_IRQ_LINK|NVREG_IRQ_RECOVER_ERROR)
 
-#define NVREG_IRQ_UNKNOWN	(~(NVREG_IRQ_RX_ERROR|NVREG_IRQ_RX|NVREG_IRQ_RX_NOBUF|NVREG_IRQ_TX_ERR| \
-					NVREG_IRQ_TX_OK|NVREG_IRQ_TIMER|NVREG_IRQ_LINK|NVREG_IRQ_RX_FORCED| \
-					NVREG_IRQ_TX_FORCED|NVREG_IRQ_RECOVER_ERROR))
-
 	NvRegUnknownSetupReg6 = 0x008,
 #define NVREG_UNKSETUP6_VAL		3
 
@@ -3424,10 +3420,10 @@ static irqreturn_t nv_nic_irq(int foo, void *data)
 
 	for (i=0; ; i++) {
 		if (!(np->msi_flags & NV_MSI_X_ENABLED)) {
-			np->events = readl(base + NvRegIrqStatus) & NVREG_IRQSTAT_MASK;
+			np->events = readl(base + NvRegIrqStatus);
 			writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
 		} else {
-			np->events = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQSTAT_MASK;
+			np->events = readl(base + NvRegMSIXIrqStatus);
 			writel(NVREG_IRQSTAT_MASK, base + NvRegMSIXIrqStatus);
 		}
 		dprintk(KERN_DEBUG "%s: irq: %08x\n", dev->name, np->events);
@@ -3475,14 +3471,6 @@ static irqreturn_t nv_nic_irq(int foo, void *data)
 			spin_unlock(&np->lock);
 			np->link_timeout = jiffies + LINK_TIMEOUT;
 		}
-		if (unlikely(np->events & (NVREG_IRQ_TX_ERR))) {
-			dprintk(KERN_DEBUG "%s: received irq with events 0x%x. Probably TX fail.\n",
-						dev->name, np->events);
-		}
-		if (unlikely(np->events & (NVREG_IRQ_UNKNOWN))) {
-			printk(KERN_DEBUG "%s: received irq with unknown events 0x%x. Please report\n",
-						dev->name, np->events);
-		}
 		if (unlikely(np->events & NVREG_IRQ_RECOVER_ERROR)) {
 			spin_lock(&np->lock);
 			/* disable interrupts on the nic */
@@ -3540,10 +3528,10 @@ static irqreturn_t nv_nic_irq_optimized(int foo, void *data)
 
 	for (i=0; ; i++) {
 		if (!(np->msi_flags & NV_MSI_X_ENABLED)) {
-			np->events = readl(base + NvRegIrqStatus) & NVREG_IRQSTAT_MASK;
+			np->events = readl(base + NvRegIrqStatus);
 			writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
 		} else {
-			np->events = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQSTAT_MASK;
+			np->events = readl(base + NvRegMSIXIrqStatus);
 			writel(NVREG_IRQSTAT_MASK, base + NvRegMSIXIrqStatus);
 		}
 		dprintk(KERN_DEBUG "%s: irq: %08x\n", dev->name, np->events);
@@ -3591,14 +3579,6 @@ static irqreturn_t nv_nic_irq_optimized(int foo, void *data)
 			spin_unlock(&np->lock);
 			np->link_timeout = jiffies + LINK_TIMEOUT;
 		}
-		if (unlikely(np->events & (NVREG_IRQ_TX_ERR))) {
-			dprintk(KERN_DEBUG "%s: received irq with events 0x%x. Probably TX fail.\n",
-						dev->name, np->events);
-		}
-		if (unlikely(np->events & (NVREG_IRQ_UNKNOWN))) {
-			printk(KERN_DEBUG "%s: received irq with unknown events 0x%x. Please report\n",
-						dev->name, np->events);
-		}
 		if (unlikely(np->events & NVREG_IRQ_RECOVER_ERROR)) {
 			spin_lock(&np->lock);
 			/* disable interrupts on the nic */
@@ -3663,10 +3643,6 @@ static irqreturn_t nv_nic_irq_tx(int foo, void *data)
 		nv_tx_done_optimized(dev, TX_WORK_PER_LOOP);
 		spin_unlock_irqrestore(&np->lock, flags);
 
-		if (unlikely(events & (NVREG_IRQ_TX_ERR))) {
-			dprintk(KERN_DEBUG "%s: received irq with events 0x%x. Probably TX fail.\n",
-						dev->name, events);
-		}
 		if (unlikely(i > max_interrupt_work)) {
 			spin_lock_irqsave(&np->lock, flags);
 			/* disable interrupts on the nic */
@@ -3825,10 +3801,6 @@ static irqreturn_t nv_nic_irq_other(int foo, void *data)
 			spin_unlock_irq(&np->lock);
 			break;
 		}
-		if (events & (NVREG_IRQ_UNKNOWN)) {
-			printk(KERN_DEBUG "%s: received irq with unknown events 0x%x. Please report\n",
-						dev->name, events);
-		}
 		if (unlikely(i > max_interrupt_work)) {
 			spin_lock_irqsave(&np->lock, flags);
 			/* disable interrupts on the nic */