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authorVeena Parat <Veena.Parat@neterion.com>2007-07-23 02:37:14 -0400
committerJeff Garzik <jeff@garzik.org>2007-07-30 15:56:04 -0400
commit491abf2537a01bef52bffc67001f59cce1fd0047 (patch)
treeca8cff9731bf7808b0a0fb17b17dd78fd297813e /drivers/net
parenteccb8628ab97f5b43e04425e983db1495fc0ef32 (diff)
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>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/s2io.c77
-rw-r--r--drivers/net/s2io.h5
2 files changed, 79 insertions, 3 deletions
diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index 724b44360a47..ce3a6d9b13c8 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -282,6 +282,7 @@ static char ethtool_driver_stats_keys[][ETH_GSTRING_LEN] = {
282 ("lro_flush_due_to_max_pkts"), 282 ("lro_flush_due_to_max_pkts"),
283 ("lro_avg_aggr_pkts"), 283 ("lro_avg_aggr_pkts"),
284 ("mem_alloc_fail_cnt"), 284 ("mem_alloc_fail_cnt"),
285 ("pci_map_fail_cnt"),
285 ("watchdog_timer_cnt"), 286 ("watchdog_timer_cnt"),
286 ("mem_allocated"), 287 ("mem_allocated"),
287 ("mem_freed"), 288 ("mem_freed"),
@@ -2271,6 +2272,7 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no)
2271 u64 Buffer0_ptr = 0, Buffer1_ptr = 0; 2272 u64 Buffer0_ptr = 0, Buffer1_ptr = 0;
2272 struct RxD1 *rxdp1; 2273 struct RxD1 *rxdp1;
2273 struct RxD3 *rxdp3; 2274 struct RxD3 *rxdp3;
2275 struct swStat *stats = &nic->mac_control.stats_info->sw_stat;
2274 2276
2275 mac_control = &nic->mac_control; 2277 mac_control = &nic->mac_control;
2276 config = &nic->config; 2278 config = &nic->config;
@@ -2360,6 +2362,11 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no)
2360 rxdp1->Buffer0_ptr = pci_map_single 2362 rxdp1->Buffer0_ptr = pci_map_single
2361 (nic->pdev, skb->data, size - NET_IP_ALIGN, 2363 (nic->pdev, skb->data, size - NET_IP_ALIGN,
2362 PCI_DMA_FROMDEVICE); 2364 PCI_DMA_FROMDEVICE);
2365 if( (rxdp1->Buffer0_ptr == 0) ||
2366 (rxdp1->Buffer0_ptr ==
2367 DMA_ERROR_CODE))
2368 goto pci_map_failed;
2369
2363 rxdp->Control_2 = 2370 rxdp->Control_2 =
2364 SET_BUFFER0_SIZE_1(size - NET_IP_ALIGN); 2371 SET_BUFFER0_SIZE_1(size - NET_IP_ALIGN);
2365 2372
@@ -2395,6 +2402,10 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no)
2395 pci_dma_sync_single_for_device(nic->pdev, 2402 pci_dma_sync_single_for_device(nic->pdev,
2396 (dma_addr_t) rxdp3->Buffer0_ptr, 2403 (dma_addr_t) rxdp3->Buffer0_ptr,
2397 BUF0_LEN, PCI_DMA_FROMDEVICE); 2404 BUF0_LEN, PCI_DMA_FROMDEVICE);
2405 if( (rxdp3->Buffer0_ptr == 0) ||
2406 (rxdp3->Buffer0_ptr == DMA_ERROR_CODE))
2407 goto pci_map_failed;
2408
2398 rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN); 2409 rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN);
2399 if (nic->rxd_mode == RXD_MODE_3B) { 2410 if (nic->rxd_mode == RXD_MODE_3B) {
2400 /* Two buffer mode */ 2411 /* Two buffer mode */
@@ -2407,12 +2418,22 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no)
2407 (nic->pdev, skb->data, dev->mtu + 4, 2418 (nic->pdev, skb->data, dev->mtu + 4,
2408 PCI_DMA_FROMDEVICE); 2419 PCI_DMA_FROMDEVICE);
2409 2420
2410 /* Buffer-1 will be dummy buffer. Not used */ 2421 if( (rxdp3->Buffer2_ptr == 0) ||
2411 if (!(rxdp3->Buffer1_ptr)) { 2422 (rxdp3->Buffer2_ptr == DMA_ERROR_CODE))
2412 rxdp3->Buffer1_ptr = 2423 goto pci_map_failed;
2424
2425 rxdp3->Buffer1_ptr =
2413 pci_map_single(nic->pdev, 2426 pci_map_single(nic->pdev,
2414 ba->ba_1, BUF1_LEN, 2427 ba->ba_1, BUF1_LEN,
2415 PCI_DMA_FROMDEVICE); 2428 PCI_DMA_FROMDEVICE);
2429 if( (rxdp3->Buffer1_ptr == 0) ||
2430 (rxdp3->Buffer1_ptr == DMA_ERROR_CODE)) {
2431 pci_unmap_single
2432 (nic->pdev,
2433 (dma_addr_t)skb->data,
2434 dev->mtu + 4,
2435 PCI_DMA_FROMDEVICE);
2436 goto pci_map_failed;
2416 } 2437 }
2417 rxdp->Control_2 |= SET_BUFFER1_SIZE_3(1); 2438 rxdp->Control_2 |= SET_BUFFER1_SIZE_3(1);
2418 rxdp->Control_2 |= SET_BUFFER2_SIZE_3 2439 rxdp->Control_2 |= SET_BUFFER2_SIZE_3
@@ -2451,6 +2472,11 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no)
2451 } 2472 }
2452 2473
2453 return SUCCESS; 2474 return SUCCESS;
2475pci_map_failed:
2476 stats->pci_map_fail_cnt++;
2477 stats->mem_freed += skb->truesize;
2478 dev_kfree_skb_irq(skb);
2479 return -ENOMEM;
2454} 2480}
2455 2481
2456static void free_rxd_blk(struct s2io_nic *sp, int ring_no, int blk) 2482static 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)
3882 struct mac_info *mac_control; 3908 struct mac_info *mac_control;
3883 struct config_param *config; 3909 struct config_param *config;
3884 int offload_type; 3910 int offload_type;
3911 struct swStat *stats = &sp->mac_control.stats_info->sw_stat;
3885 3912
3886 mac_control = &sp->mac_control; 3913 mac_control = &sp->mac_control;
3887 config = &sp->config; 3914 config = &sp->config;
@@ -3966,11 +3993,18 @@ static int s2io_xmit(struct sk_buff *skb, struct net_device *dev)
3966 txdp->Buffer_Pointer = pci_map_single(sp->pdev, 3993 txdp->Buffer_Pointer = pci_map_single(sp->pdev,
3967 sp->ufo_in_band_v, 3994 sp->ufo_in_band_v,
3968 sizeof(u64), PCI_DMA_TODEVICE); 3995 sizeof(u64), PCI_DMA_TODEVICE);
3996 if((txdp->Buffer_Pointer == 0) ||
3997 (txdp->Buffer_Pointer == DMA_ERROR_CODE))
3998 goto pci_map_failed;
3969 txdp++; 3999 txdp++;
3970 } 4000 }
3971 4001
3972 txdp->Buffer_Pointer = pci_map_single 4002 txdp->Buffer_Pointer = pci_map_single
3973 (sp->pdev, skb->data, frg_len, PCI_DMA_TODEVICE); 4003 (sp->pdev, skb->data, frg_len, PCI_DMA_TODEVICE);
4004 if((txdp->Buffer_Pointer == 0) ||
4005 (txdp->Buffer_Pointer == DMA_ERROR_CODE))
4006 goto pci_map_failed;
4007
3974 txdp->Host_Control = (unsigned long) skb; 4008 txdp->Host_Control = (unsigned long) skb;
3975 txdp->Control_1 |= TXD_BUFFER0_SIZE(frg_len); 4009 txdp->Control_1 |= TXD_BUFFER0_SIZE(frg_len);
3976 if (offload_type == SKB_GSO_UDP) 4010 if (offload_type == SKB_GSO_UDP)
@@ -4027,6 +4061,13 @@ static int s2io_xmit(struct sk_buff *skb, struct net_device *dev)
4027 spin_unlock_irqrestore(&sp->tx_lock, flags); 4061 spin_unlock_irqrestore(&sp->tx_lock, flags);
4028 4062
4029 return 0; 4063 return 0;
4064pci_map_failed:
4065 stats->pci_map_fail_cnt++;
4066 netif_stop_queue(dev);
4067 stats->mem_freed += skb->truesize;
4068 dev_kfree_skb(skb);
4069 spin_unlock_irqrestore(&sp->tx_lock, flags);
4070 return 0;
4030} 4071}
4031 4072
4032static void 4073static void
@@ -5769,6 +5810,7 @@ static void s2io_get_ethtool_stats(struct net_device *dev,
5769 else 5810 else
5770 tmp_stats[i++] = 0; 5811 tmp_stats[i++] = 0;
5771 tmp_stats[i++] = stat_info->sw_stat.mem_alloc_fail_cnt; 5812 tmp_stats[i++] = stat_info->sw_stat.mem_alloc_fail_cnt;
5813 tmp_stats[i++] = stat_info->sw_stat.pci_map_fail_cnt;
5772 tmp_stats[i++] = stat_info->sw_stat.watchdog_timer_cnt; 5814 tmp_stats[i++] = stat_info->sw_stat.watchdog_timer_cnt;
5773 tmp_stats[i++] = stat_info->sw_stat.mem_allocated; 5815 tmp_stats[i++] = stat_info->sw_stat.mem_allocated;
5774 tmp_stats[i++] = stat_info->sw_stat.mem_freed; 5816 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,
6112 u64 *temp2, int size) 6154 u64 *temp2, int size)
6113{ 6155{
6114 struct net_device *dev = sp->dev; 6156 struct net_device *dev = sp->dev;
6157 struct swStat *stats = &sp->mac_control.stats_info->sw_stat;
6115 6158
6116 if ((sp->rxd_mode == RXD_MODE_1) && (rxdp->Host_Control == 0)) { 6159 if ((sp->rxd_mode == RXD_MODE_1) && (rxdp->Host_Control == 0)) {
6117 struct RxD1 *rxdp1 = (struct RxD1 *)rxdp; 6160 struct RxD1 *rxdp1 = (struct RxD1 *)rxdp;
@@ -6144,6 +6187,10 @@ static int set_rxd_buffer_pointer(struct s2io_nic *sp, struct RxD_t *rxdp,
6144 pci_map_single( sp->pdev, (*skb)->data, 6187 pci_map_single( sp->pdev, (*skb)->data,
6145 size - NET_IP_ALIGN, 6188 size - NET_IP_ALIGN,
6146 PCI_DMA_FROMDEVICE); 6189 PCI_DMA_FROMDEVICE);
6190 if( (rxdp1->Buffer0_ptr == 0) ||
6191 (rxdp1->Buffer0_ptr == DMA_ERROR_CODE)) {
6192 goto memalloc_failed;
6193 }
6147 rxdp->Host_Control = (unsigned long) (*skb); 6194 rxdp->Host_Control = (unsigned long) (*skb);
6148 } 6195 }
6149 } else if ((sp->rxd_mode == RXD_MODE_3B) && (rxdp->Host_Control == 0)) { 6196 } 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,
6169 pci_map_single(sp->pdev, (*skb)->data, 6216 pci_map_single(sp->pdev, (*skb)->data,
6170 dev->mtu + 4, 6217 dev->mtu + 4,
6171 PCI_DMA_FROMDEVICE); 6218 PCI_DMA_FROMDEVICE);
6219 if( (rxdp3->Buffer2_ptr == 0) ||
6220 (rxdp3->Buffer2_ptr == DMA_ERROR_CODE)) {
6221 goto memalloc_failed;
6222 }
6172 rxdp3->Buffer0_ptr = *temp0 = 6223 rxdp3->Buffer0_ptr = *temp0 =
6173 pci_map_single( sp->pdev, ba->ba_0, BUF0_LEN, 6224 pci_map_single( sp->pdev, ba->ba_0, BUF0_LEN,
6174 PCI_DMA_FROMDEVICE); 6225 PCI_DMA_FROMDEVICE);
6226 if( (rxdp3->Buffer0_ptr == 0) ||
6227 (rxdp3->Buffer0_ptr == DMA_ERROR_CODE)) {
6228 pci_unmap_single (sp->pdev,
6229 (dma_addr_t)(*skb)->data,
6230 dev->mtu + 4, PCI_DMA_FROMDEVICE);
6231 goto memalloc_failed;
6232 }
6175 rxdp->Host_Control = (unsigned long) (*skb); 6233 rxdp->Host_Control = (unsigned long) (*skb);
6176 6234
6177 /* Buffer-1 will be dummy buffer not used */ 6235 /* Buffer-1 will be dummy buffer not used */
6178 rxdp3->Buffer1_ptr = *temp1 = 6236 rxdp3->Buffer1_ptr = *temp1 =
6179 pci_map_single(sp->pdev, ba->ba_1, BUF1_LEN, 6237 pci_map_single(sp->pdev, ba->ba_1, BUF1_LEN,
6180 PCI_DMA_FROMDEVICE); 6238 PCI_DMA_FROMDEVICE);
6239 if( (rxdp3->Buffer1_ptr == 0) ||
6240 (rxdp3->Buffer1_ptr == DMA_ERROR_CODE)) {
6241 pci_unmap_single (sp->pdev,
6242 (dma_addr_t)(*skb)->data,
6243 dev->mtu + 4, PCI_DMA_FROMDEVICE);
6244 goto memalloc_failed;
6245 }
6181 } 6246 }
6182 } 6247 }
6183 return 0; 6248 return 0;
6249 memalloc_failed:
6250 stats->pci_map_fail_cnt++;
6251 stats->mem_freed += (*skb)->truesize;
6252 dev_kfree_skb(*skb);
6253 return -ENOMEM;
6184} 6254}
6255
6185static void set_rxd_buffer_size(struct s2io_nic *sp, struct RxD_t *rxdp, 6256static void set_rxd_buffer_size(struct s2io_nic *sp, struct RxD_t *rxdp,
6186 int size) 6257 int size)
6187{ 6258{
diff --git a/drivers/net/s2io.h b/drivers/net/s2io.h
index aa5428c4368e..92983ee7df8c 100644
--- a/drivers/net/s2io.h
+++ b/drivers/net/s2io.h
@@ -74,6 +74,10 @@ static int debug_level = ERR_DBG;
74/* DEBUG message print. */ 74/* DEBUG message print. */
75#define DBG_PRINT(dbg_level, args...) if(!(debug_level<dbg_level)) printk(args) 75#define DBG_PRINT(dbg_level, args...) if(!(debug_level<dbg_level)) printk(args)
76 76
77#ifndef DMA_ERROR_CODE
78#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
79#endif
80
77/* Protocol assist features of the NIC */ 81/* Protocol assist features of the NIC */
78#define L3_CKSUM_OK 0xFFFF 82#define L3_CKSUM_OK 0xFFFF
79#define L4_CKSUM_OK 0xFFFF 83#define L4_CKSUM_OK 0xFFFF
@@ -97,6 +101,7 @@ struct swStat {
97 unsigned long long num_aggregations; 101 unsigned long long num_aggregations;
98 /* Other statistics */ 102 /* Other statistics */
99 unsigned long long mem_alloc_fail_cnt; 103 unsigned long long mem_alloc_fail_cnt;
104 unsigned long long pci_map_fail_cnt;
100 unsigned long long watchdog_timer_cnt; 105 unsigned long long watchdog_timer_cnt;
101 unsigned long long mem_allocated; 106 unsigned long long mem_allocated;
102 unsigned long long mem_freed; 107 unsigned long long mem_freed;