Re: [PATCH 2/6] IP100A Fix Tx pause bug

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Jesse Huang wrote:
@@ -1099,6 +1099,10 @@ reset_tx (struct net_device *dev)
 	}
 	np->cur_tx = np->dirty_tx = 0;
 	np->cur_task = 0;
+	
+	np->last_tx=0;

add whitespace, to make it look like all other assignments:
s/=/ = /


+	iowrite8(127, ioaddr + TxDMAPollPeriod);	
+	

what does the value 127 represent?


 	iowrite16 (StatsEnable | RxEnable | TxEnable, ioaddr + MACCtrl1);
 	return 0;
 }
@@ -1156,29 +1160,29 @@ static irqreturn_t intr_handler(int irq,
 						np->stats.tx_fifo_errors++;
 					if (tx_status & 0x02)
 						np->stats.tx_window_errors++;
-					/*
-					** This reset has been verified on
-					** DFE-580TX boards ! [email protected].
-					*/
-					if (tx_status & 0x10) {	/* TxUnderrun */
-						unsigned short txthreshold;
-
-						txthreshold = ioread16 (ioaddr + TxStartThresh);
-						/* Restart Tx FIFO and transmitter */
-						sundance_reset(dev, (NetworkReset|FIFOReset|TxReset) << 16);
-						iowrite16 (txthreshold, ioaddr + TxStartThresh);
-						/* No need to reset the Tx pointer here */
+
+					/* FIFO ERROR need to be reset tx */
+					if (tx_status & 0x10) {	/* Reset the Tx. */
+						spin_lock(&np->lock);
+						reset_tx(dev);
+						spin_unlock(&np->lock);
+					}
+					if (tx_status & 0x1e) {
+					/* need to make sure tx enabled */
+						int i = 10;
+						do {
+							iowrite16 (ioread16(ioaddr + MACCtrl1) | TxEnable, ioaddr + MACCtrl1);
+							if (ioread16(ioaddr + MACCtrl1) & TxEnabled)
+								break;
+							mdelay(1);
+						} while (--i);
 					}
-					/* Restart the Tx. */
-					iowrite16 (TxEnable, ioaddr + MACCtrl1);
 				}
-				/* Yup, this is a documentation bug.  It cost me *hours*. */
+				
 				iowrite16 (0, ioaddr + TxStatus);
-				if (tx_cnt < 0) {
-					iowrite32(5000, ioaddr + DownCounter);
-					break;
-				}
 				tx_status = ioread16 (ioaddr + TxStatus);
+				if (tx_cnt < 0)
+					break;
 			}
 			hw_frame_id = (tx_status >> 8) & 0xff;
 		} else 	{
@@ -1244,6 +1248,9 @@ static irqreturn_t intr_handler(int irq,
 	if (netif_msg_intr(np))
 		printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
 			   dev->name, ioread16(ioaddr + IntrStatus));
+ + iowrite32(5000, ioaddr + DownCounter); + return IRQ_RETVAL(handled);

DownCounter should not be written unconditionally. Consider shared interrupts, where sundance performs no work, and handled==0.

	Jeff


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