[PATCH 5/13] forcedeth: remove overhead

[PATCH 5/13] forcedeth: remove overhead

[Ayaz Abdulla]

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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: Ayaz Abdulla <aabdulla@nvidia.com>


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--- old/drivers/net/forcedeth.c	2009-03-05 10:40:41.000000000 -0800
+++ new/drivers/net/forcedeth.c	2009-03-05 10:40:58.000000000 -0800
@@ -120,10 +120,6 @@
 #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 @@
 
 	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 @@
 			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 @@
 
 	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 @@
 			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 @@
 		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 @@
 			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 */

Re: [PATCH 5/13] forcedeth: remove overhead

[David Miller]

From: Ayaz Abdulla <aabdulla@nvidia.com>
Date: Thu, 05 Mar 2009 13:02:06 -0500

> 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: Ayaz Abdulla <aabdulla@nvidia.com>

Applied.