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-rw-r--r--drivers/net/sis900.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/net/sis900.c b/drivers/net/sis900.c
index 23b713c700b3..1d4d88680db1 100644
--- a/drivers/net/sis900.c
+++ b/drivers/net/sis900.c
@@ -1696,15 +1696,20 @@ static int sis900_rx(struct net_device *net_dev)
long ioaddr = net_dev->base_addr;
unsigned int entry = sis_priv->cur_rx % NUM_RX_DESC;
u32 rx_status = sis_priv->rx_ring[entry].cmdsts;
+ int rx_work_limit;
if (netif_msg_rx_status(sis_priv))
printk(KERN_DEBUG "sis900_rx, cur_rx:%4.4d, dirty_rx:%4.4d "
"status:0x%8.8x\n",
sis_priv->cur_rx, sis_priv->dirty_rx, rx_status);
+ rx_work_limit = sis_priv->dirty_rx + NUM_RX_DESC - sis_priv->cur_rx;
while (rx_status & OWN) {
unsigned int rx_size;
+ if (--rx_work_limit < 0)
+ break;
+
rx_size = (rx_status & DSIZE) - CRC_SIZE;
if (rx_status & (ABORT|OVERRUN|TOOLONG|RUNT|RXISERR|CRCERR|FAERR)) {
@@ -1732,9 +1737,11 @@ static int sis900_rx(struct net_device *net_dev)
we are working on NULL sk_buff :-( */
if (sis_priv->rx_skbuff[entry] == NULL) {
if (netif_msg_rx_err(sis_priv))
- printk(KERN_INFO "%s: NULL pointer "
- "encountered in Rx ring, skipping\n",
- net_dev->name);
+ printk(KERN_WARNING "%s: NULL pointer "
+ "encountered in Rx ring\n"
+ "cur_rx:%4.4d, dirty_rx:%4.4d\n",
+ net_dev->name, sis_priv->cur_rx,
+ sis_priv->dirty_rx);
break;
}
@@ -1770,6 +1777,7 @@ static int sis900_rx(struct net_device *net_dev)
sis_priv->rx_ring[entry].cmdsts = 0;
sis_priv->rx_ring[entry].bufptr = 0;
sis_priv->stats.rx_dropped++;
+ sis_priv->cur_rx++;
break;
}
skb->dev = net_dev;
@@ -1787,7 +1795,7 @@ static int sis900_rx(struct net_device *net_dev)
/* refill the Rx buffer, what if the rate of refilling is slower
* than consuming ?? */
- for (;sis_priv->cur_rx - sis_priv->dirty_rx > 0; sis_priv->dirty_rx++) {
+ for (; sis_priv->cur_rx != sis_priv->dirty_rx; sis_priv->dirty_rx++) {
struct sk_buff *skb;
entry = sis_priv->dirty_rx % NUM_RX_DESC;