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Subject[PATCH 14/21]: powerpc/cell spidernet NAPI polling info.
From

This patch moves transmit queue cleanup code out of the
interrupt context, and into the NAPI polling routine.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: James K Lewis <jklewis@us.ibm.com>

----
drivers/net/spider_net.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
Index: linux-2.6.18-mm2/drivers/net/spider_net.c
===================================================================
--- linux-2.6.18-mm2.orig/drivers/net/spider_net.c 2006-10-10 13:09:27.000000000 -0500
+++ linux-2.6.18-mm2/drivers/net/spider_net.c 2006-10-10 13:10:37.000000000 -0500
@@ -715,7 +715,7 @@ spider_net_release_tx_descr(struct spide
len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
pci_unmap_single(card->pdev, descr->buf_addr, len,
PCI_DMA_TODEVICE);
- dev_kfree_skb_any(skb);
+ dev_kfree_skb(skb);
}

static void
@@ -885,9 +885,10 @@ spider_net_xmit(struct sk_buff *skb, str
* spider_net_cleanup_tx_ring - cleans up the TX ring
* @card: card structure
*
- * spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use
- * interrupts to cleanup our TX ring) and returns sent packets to the stack
- * by freeing them
+ * spider_net_cleanup_tx_ring is called by either the tx_timer
+ * or from the NAPI polling routine.
+ * This routine releases resources associted with transmitted
+ * packets, including updating the queue tail pointer.
*/
static void
spider_net_cleanup_tx_ring(struct spider_net_card *card)
@@ -1092,6 +1093,7 @@ spider_net_poll(struct net_device *netde
int packets_to_do, packets_done = 0;
int no_more_packets = 0;

+ spider_net_cleanup_tx_ring(card);
packets_to_do = min(*budget, netdev->quota);

while (packets_to_do) {
@@ -1504,10 +1506,8 @@ spider_net_interrupt(int irq, void *ptr,
spider_net_rx_irq_off(card);
netif_rx_schedule(netdev);
}
- if (status_reg & SPIDER_NET_TXINT ) {
- spider_net_cleanup_tx_ring(card);
- netif_wake_queue(netdev);
- }
+ if (status_reg & SPIDER_NET_TXINT)
+ netif_rx_schedule(netdev);

if (status_reg & SPIDER_NET_ERRINT )
spider_net_handle_error_irq(card, status_reg);
-
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