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Spidernet Cleanup return codes 

Simplify the somewhat convoluted use of return codes
in the rx buffer handling.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Cc: James K Lewis <jklewis@us.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Linas Vepstas 2006-12-13 15:17:39 -06:00 committed by Jeff Garzik
parent 366684bd0d
commit 7f7223b8f1
1 changed files with 12 additions and 20 deletions
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32
drivers/net/spider_net.c
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@ -911,12 +911,10 @@ spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
* @descr: descriptor to process
* @card: card structure
*
* returns 1 on success, 0 if no packet was passed to the stack
*
* Fills out skb structure and passes the data to the stack.
* The descriptor state is not changed.
*/
static int
static void
spider_net_pass_skb_up(struct spider_net_descr *descr,
struct spider_net_card *card)
{
@ -961,8 +959,6 @@ spider_net_pass_skb_up(struct spider_net_descr *descr,
/* update netdevice statistics */
card->netdev_stats.rx_packets++;
card->netdev_stats.rx_bytes += skb->len;
return 1;
}
/**
@ -981,7 +977,6 @@ spider_net_decode_one_descr(struct spider_net_card *card)
struct spider_net_descr_chain *chain = &card->rx_chain;
struct spider_net_descr *descr = chain->tail;
int status;
int result;
status = spider_net_get_descr_status(descr);
@ -999,8 +994,6 @@ spider_net_decode_one_descr(struct spider_net_card *card)
/* descriptor definitively used -- move on tail */
chain->tail = descr->next;
result = 0;
/* unmap descriptor */
pci_unmap_single(card->pdev, descr->buf_addr,
SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
@ -1012,8 +1005,7 @@ spider_net_decode_one_descr(struct spider_net_card *card)
pr_err("%s: dropping RX descriptor with state %d\n",
card->netdev->name, status);
card->netdev_stats.rx_dropped++;
dev_kfree_skb_irq(descr->skb);
goto refill;
goto bad_desc;
}
if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
@ -1022,8 +1014,7 @@ spider_net_decode_one_descr(struct spider_net_card *card)
pr_err("%s: RX descriptor with unkown state %d\n",
card->netdev->name, status);
card->spider_stats.rx_desc_unk_state++;
dev_kfree_skb_irq(descr->skb);
goto refill;
goto bad_desc;
}
/* The cases we'll throw away the packet immediately */
@ -1033,17 +1024,18 @@ spider_net_decode_one_descr(struct spider_net_card *card)
"data_status=x%08x, data_error=x%08x\n",
card->netdev->name,
descr->data_status, descr->data_error);
card->spider_stats.rx_desc_error++;
dev_kfree_skb_irq(descr->skb);
goto refill;
goto bad_desc;
}
/* ok, we've got a packet in descr */
result = spider_net_pass_skb_up(descr, card);
refill:
/* change the descriptor state: */
/* Ok, we've got a packet in descr */
spider_net_pass_skb_up(descr, card);
descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
return result;
return 1;
bad_desc:
dev_kfree_skb_irq(descr->skb);
descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
return 0;
}
/**