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Diffstat (limited to 'drivers/net/smc91x.c')
-rw-r--r--drivers/net/smc91x.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/net/smc91x.c b/drivers/net/smc91x.c
index c91e2e81f131..1021108e9a25 100644
--- a/drivers/net/smc91x.c
+++ b/drivers/net/smc91x.c
@@ -155,6 +155,12 @@ MODULE_LICENSE("GPL");
155#define MEMORY_WAIT_TIME 16 155#define MEMORY_WAIT_TIME 16
156 156
157/* 157/*
158 * The maximum number of processing loops allowed for each call to the
159 * IRQ handler.
160 */
161#define MAX_IRQ_LOOPS 8
162
163/*
158 * This selects whether TX packets are sent one by one to the SMC91x internal 164 * This selects whether TX packets are sent one by one to the SMC91x internal
159 * memory and throttled until transmission completes. This may prevent 165 * memory and throttled until transmission completes. This may prevent
160 * RX overruns a litle by keeping much of the memory free for RX packets 166 * RX overruns a litle by keeping much of the memory free for RX packets
@@ -684,7 +690,6 @@ static void smc_hardware_send_pkt(unsigned long data)
684 690
685 /* queue the packet for TX */ 691 /* queue the packet for TX */
686 SMC_SET_MMU_CMD(MC_ENQUEUE); 692 SMC_SET_MMU_CMD(MC_ENQUEUE);
687 SMC_ACK_INT(IM_TX_EMPTY_INT);
688 smc_special_unlock(&lp->lock); 693 smc_special_unlock(&lp->lock);
689 694
690 dev->trans_start = jiffies; 695 dev->trans_start = jiffies;
@@ -1305,7 +1310,7 @@ static irqreturn_t smc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1305 SMC_SET_INT_MASK(0); 1310 SMC_SET_INT_MASK(0);
1306 1311
1307 /* set a timeout value, so I don't stay here forever */ 1312 /* set a timeout value, so I don't stay here forever */
1308 timeout = 8; 1313 timeout = MAX_IRQ_LOOPS;
1309 1314
1310 do { 1315 do {
1311 status = SMC_GET_INT(); 1316 status = SMC_GET_INT();
@@ -1372,10 +1377,13 @@ static irqreturn_t smc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1372 /* restore register states */ 1377 /* restore register states */
1373 SMC_SET_PTR(saved_pointer); 1378 SMC_SET_PTR(saved_pointer);
1374 SMC_SET_INT_MASK(mask); 1379 SMC_SET_INT_MASK(mask);
1375
1376 spin_unlock(&lp->lock); 1380 spin_unlock(&lp->lock);
1377 1381
1378 DBG(3, "%s: Interrupt done (%d loops)\n", dev->name, 8-timeout); 1382 if (timeout == MAX_IRQ_LOOPS)
1383 PRINTK("%s: spurious interrupt (mask = 0x%02x)\n",
1384 dev->name, mask);
1385 DBG(3, "%s: Interrupt done (%d loops)\n",
1386 dev->name, MAX_IRQ_LOOPS - timeout);
1379 1387
1380 /* 1388 /*
1381 * We return IRQ_HANDLED unconditionally here even if there was 1389 * We return IRQ_HANDLED unconditionally here even if there was