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author | Veena Parat <Veena.Parat@neterion.com> | 2007-07-23 02:37:14 -0400 |
---|---|---|
committer | Jeff Garzik <jeff@garzik.org> | 2007-07-30 15:56:04 -0400 |
commit | 491abf2537a01bef52bffc67001f59cce1fd0047 (patch) | |
tree | ca8cff9731bf7808b0a0fb17b17dd78fd297813e | |
parent | eccb8628ab97f5b43e04425e983db1495fc0ef32 (diff) | |
download | linux-3.10-491abf2537a01bef52bffc67001f59cce1fd0047.tar.gz linux-3.10-491abf2537a01bef52bffc67001f59cce1fd0047.tar.bz2 linux-3.10-491abf2537a01bef52bffc67001f59cce1fd0047.zip |
S2IO: Checking for the return value of pci map function
- Checking for the return value of pci map function
- Implemented Francois Romieu's comments on eliminating code duplication
using goto
- Implemented Francois Romieu's comments on using a temporary variable for
accessing statistics structure
Signed-off-by: Veena Parat <veena.parat@neterion.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
-rw-r--r-- | drivers/net/s2io.c | 77 | ||||
-rw-r--r-- | drivers/net/s2io.h | 5 |
2 files changed, 79 insertions, 3 deletions
diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c index 724b44360a4..ce3a6d9b13c 100644 --- a/drivers/net/s2io.c +++ b/drivers/net/s2io.c @@ -282,6 +282,7 @@ static char ethtool_driver_stats_keys[][ETH_GSTRING_LEN] = { ("lro_flush_due_to_max_pkts"), ("lro_avg_aggr_pkts"), ("mem_alloc_fail_cnt"), + ("pci_map_fail_cnt"), ("watchdog_timer_cnt"), ("mem_allocated"), ("mem_freed"), @@ -2271,6 +2272,7 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no) u64 Buffer0_ptr = 0, Buffer1_ptr = 0; struct RxD1 *rxdp1; struct RxD3 *rxdp3; + struct swStat *stats = &nic->mac_control.stats_info->sw_stat; mac_control = &nic->mac_control; config = &nic->config; @@ -2360,6 +2362,11 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no) rxdp1->Buffer0_ptr = pci_map_single (nic->pdev, skb->data, size - NET_IP_ALIGN, PCI_DMA_FROMDEVICE); + if( (rxdp1->Buffer0_ptr == 0) || + (rxdp1->Buffer0_ptr == + DMA_ERROR_CODE)) + goto pci_map_failed; + rxdp->Control_2 = SET_BUFFER0_SIZE_1(size - NET_IP_ALIGN); @@ -2395,6 +2402,10 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no) pci_dma_sync_single_for_device(nic->pdev, (dma_addr_t) rxdp3->Buffer0_ptr, BUF0_LEN, PCI_DMA_FROMDEVICE); + if( (rxdp3->Buffer0_ptr == 0) || + (rxdp3->Buffer0_ptr == DMA_ERROR_CODE)) + goto pci_map_failed; + rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN); if (nic->rxd_mode == RXD_MODE_3B) { /* Two buffer mode */ @@ -2407,12 +2418,22 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no) (nic->pdev, skb->data, dev->mtu + 4, PCI_DMA_FROMDEVICE); - /* Buffer-1 will be dummy buffer. Not used */ - if (!(rxdp3->Buffer1_ptr)) { - rxdp3->Buffer1_ptr = + if( (rxdp3->Buffer2_ptr == 0) || + (rxdp3->Buffer2_ptr == DMA_ERROR_CODE)) + goto pci_map_failed; + + rxdp3->Buffer1_ptr = pci_map_single(nic->pdev, ba->ba_1, BUF1_LEN, PCI_DMA_FROMDEVICE); + if( (rxdp3->Buffer1_ptr == 0) || + (rxdp3->Buffer1_ptr == DMA_ERROR_CODE)) { + pci_unmap_single + (nic->pdev, + (dma_addr_t)skb->data, + dev->mtu + 4, + PCI_DMA_FROMDEVICE); + goto pci_map_failed; } rxdp->Control_2 |= SET_BUFFER1_SIZE_3(1); rxdp->Control_2 |= SET_BUFFER2_SIZE_3 @@ -2451,6 +2472,11 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no) } return SUCCESS; +pci_map_failed: + stats->pci_map_fail_cnt++; + stats->mem_freed += skb->truesize; + dev_kfree_skb_irq(skb); + return -ENOMEM; } static void free_rxd_blk(struct s2io_nic *sp, int ring_no, int blk) @@ -3882,6 +3908,7 @@ static int s2io_xmit(struct sk_buff *skb, struct net_device *dev) struct mac_info *mac_control; struct config_param *config; int offload_type; + struct swStat *stats = &sp->mac_control.stats_info->sw_stat; mac_control = &sp->mac_control; config = &sp->config; @@ -3966,11 +3993,18 @@ static int s2io_xmit(struct sk_buff *skb, struct net_device *dev) txdp->Buffer_Pointer = pci_map_single(sp->pdev, sp->ufo_in_band_v, sizeof(u64), PCI_DMA_TODEVICE); + if((txdp->Buffer_Pointer == 0) || + (txdp->Buffer_Pointer == DMA_ERROR_CODE)) + goto pci_map_failed; txdp++; } txdp->Buffer_Pointer = pci_map_single (sp->pdev, skb->data, frg_len, PCI_DMA_TODEVICE); + if((txdp->Buffer_Pointer == 0) || + (txdp->Buffer_Pointer == DMA_ERROR_CODE)) + goto pci_map_failed; + txdp->Host_Control = (unsigned long) skb; txdp->Control_1 |= TXD_BUFFER0_SIZE(frg_len); if (offload_type == SKB_GSO_UDP) @@ -4027,6 +4061,13 @@ static int s2io_xmit(struct sk_buff *skb, struct net_device *dev) spin_unlock_irqrestore(&sp->tx_lock, flags); return 0; +pci_map_failed: + stats->pci_map_fail_cnt++; + netif_stop_queue(dev); + stats->mem_freed += skb->truesize; + dev_kfree_skb(skb); + spin_unlock_irqrestore(&sp->tx_lock, flags); + return 0; } static void @@ -5769,6 +5810,7 @@ static void s2io_get_ethtool_stats(struct net_device *dev, else tmp_stats[i++] = 0; tmp_stats[i++] = stat_info->sw_stat.mem_alloc_fail_cnt; + tmp_stats[i++] = stat_info->sw_stat.pci_map_fail_cnt; tmp_stats[i++] = stat_info->sw_stat.watchdog_timer_cnt; tmp_stats[i++] = stat_info->sw_stat.mem_allocated; tmp_stats[i++] = stat_info->sw_stat.mem_freed; @@ -6112,6 +6154,7 @@ static int set_rxd_buffer_pointer(struct s2io_nic *sp, struct RxD_t *rxdp, u64 *temp2, int size) { struct net_device *dev = sp->dev; + struct swStat *stats = &sp->mac_control.stats_info->sw_stat; if ((sp->rxd_mode == RXD_MODE_1) && (rxdp->Host_Control == 0)) { struct RxD1 *rxdp1 = (struct RxD1 *)rxdp; @@ -6144,6 +6187,10 @@ static int set_rxd_buffer_pointer(struct s2io_nic *sp, struct RxD_t *rxdp, pci_map_single( sp->pdev, (*skb)->data, size - NET_IP_ALIGN, PCI_DMA_FROMDEVICE); + if( (rxdp1->Buffer0_ptr == 0) || + (rxdp1->Buffer0_ptr == DMA_ERROR_CODE)) { + goto memalloc_failed; + } rxdp->Host_Control = (unsigned long) (*skb); } } else if ((sp->rxd_mode == RXD_MODE_3B) && (rxdp->Host_Control == 0)) { @@ -6169,19 +6216,43 @@ static int set_rxd_buffer_pointer(struct s2io_nic *sp, struct RxD_t *rxdp, pci_map_single(sp->pdev, (*skb)->data, dev->mtu + 4, PCI_DMA_FROMDEVICE); + if( (rxdp3->Buffer2_ptr == 0) || + (rxdp3->Buffer2_ptr == DMA_ERROR_CODE)) { + goto memalloc_failed; + } rxdp3->Buffer0_ptr = *temp0 = pci_map_single( sp->pdev, ba->ba_0, BUF0_LEN, PCI_DMA_FROMDEVICE); + if( (rxdp3->Buffer0_ptr == 0) || + (rxdp3->Buffer0_ptr == DMA_ERROR_CODE)) { + pci_unmap_single (sp->pdev, + (dma_addr_t)(*skb)->data, + dev->mtu + 4, PCI_DMA_FROMDEVICE); + goto memalloc_failed; + } rxdp->Host_Control = (unsigned long) (*skb); /* Buffer-1 will be dummy buffer not used */ rxdp3->Buffer1_ptr = *temp1 = pci_map_single(sp->pdev, ba->ba_1, BUF1_LEN, PCI_DMA_FROMDEVICE); + if( (rxdp3->Buffer1_ptr == 0) || + (rxdp3->Buffer1_ptr == DMA_ERROR_CODE)) { + pci_unmap_single (sp->pdev, + (dma_addr_t)(*skb)->data, + dev->mtu + 4, PCI_DMA_FROMDEVICE); + goto memalloc_failed; + } } } return 0; + memalloc_failed: + stats->pci_map_fail_cnt++; + stats->mem_freed += (*skb)->truesize; + dev_kfree_skb(*skb); + return -ENOMEM; } + static void set_rxd_buffer_size(struct s2io_nic *sp, struct RxD_t *rxdp, int size) { diff --git a/drivers/net/s2io.h b/drivers/net/s2io.h index aa5428c4368..92983ee7df8 100644 --- a/drivers/net/s2io.h +++ b/drivers/net/s2io.h @@ -74,6 +74,10 @@ static int debug_level = ERR_DBG; /* DEBUG message print. */ #define DBG_PRINT(dbg_level, args...) if(!(debug_level<dbg_level)) printk(args) +#ifndef DMA_ERROR_CODE +#define DMA_ERROR_CODE (~(dma_addr_t)0x0) +#endif + /* Protocol assist features of the NIC */ #define L3_CKSUM_OK 0xFFFF #define L4_CKSUM_OK 0xFFFF @@ -97,6 +101,7 @@ struct swStat { unsigned long long num_aggregations; /* Other statistics */ unsigned long long mem_alloc_fail_cnt; + unsigned long long pci_map_fail_cnt; unsigned long long watchdog_timer_cnt; unsigned long long mem_allocated; unsigned long long mem_freed; 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