[PATCH 0/2] ethernet: Use NULL to compare with pointer-typed value rather than 0

STALE2918d

Revision v1 of 2 in this series.

5 messages, 2 authors, 2018-08-18 · open the first message on its own page

[PATCH 0/2] ethernet: Use NULL to compare with pointer-typed value rather than 0

From: zhong jiang <hidden>
Date: 2018-08-17 13:30:54

zhong jiang (2):
  ethernet: declance:  Use NULL to compare with pointer-typed value
    rather than 0
  ethernet: lpc_eth: Use NULL to compare with pointer-typed value
    rather than 0

 drivers/net/ethernet/amd/declance.c | 2 +-
 drivers/net/ethernet/nxp/lpc_eth.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

-- 
1.7.12.4

[PATCH 1/2] ethernet: declance: Use NULL to compare with pointer-typed value rather than 0

From: zhong jiang <hidden>
Date: 2018-08-17 13:30:51

We should use NULL to compare with pointer-typed value rather than
0. The issue is detected with the help of Coccinelle.
---
 drivers/net/ethernet/amd/declance.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/amd/declance.c b/drivers/net/ethernet/amd/declance.c
index 116997a..6e035df 100644
--- a/drivers/net/ethernet/amd/declance.c
+++ b/drivers/net/ethernet/amd/declance.c
@@ -607,7 +607,7 @@ static int lance_rx(struct net_device *dev)
 			len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
 			skb = netdev_alloc_skb(dev, len + 2);
 
-			if (skb == 0) {
+			if (skb == NULL) {
 				dev->stats.rx_dropped++;
 				*rds_ptr(rd, mblength, lp->type) = 0;
 				*rds_ptr(rd, rmd1, lp->type) =
-- 
1.7.12.4

[PATCH 2/2] ethernet: lpc_eth: Use NULL to compare with pointer-typed value rather than 0

From: zhong jiang <hidden>
Date: 2018-08-17 13:31:00

We should use NULL to compare with pointer-typed value rather than 0.
The issue is detected with the help of Coccinelle.
---
 drivers/net/ethernet/nxp/lpc_eth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index 08381ef..04d9e62 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -1350,7 +1350,7 @@ static int lpc_eth_drv_probe(struct platform_device *pdev)
 				"IRAM not big enough for net buffers, using SDRAM instead.\n");
 	}
 
-	if (pldat->dma_buff_base_v == 0) {
+	if (pldat->dma_buff_base_v == NULL) {
 		ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 		if (ret)
 			goto err_out_free_irq;
-- 
1.7.12.4

Re: [PATCH 2/2] ethernet: lpc_eth: Use NULL to compare with pointer-typed value rather than 0

From: Vladimir Zapolskiy <vz@mleia.com>
Date: 2018-08-17 15:29:06

Hi zhong jiang,

On 08/17/2018 04:18 PM, zhong jiang wrote:
quoted hunk
We should use NULL to compare with pointer-typed value rather than 0.
The issue is detected with the help of Coccinelle.
---
 drivers/net/ethernet/nxp/lpc_eth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index 08381ef..04d9e62 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -1350,7 +1350,7 @@ static int lpc_eth_drv_probe(struct platform_device *pdev)
 				"IRAM not big enough for net buffers, using SDRAM instead.\n");
 	}
 
-	if (pldat->dma_buff_base_v == 0) {
+	if (pldat->dma_buff_base_v == NULL) {
That's a valid finding, but please use a common 0 and NULL comparison in form of

	if (!pldat->dma_buff_base_v)

To the change above please feel free to add my

Acked-by: Vladimir Zapolskiy <vz@mleia.com>
 		ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 		if (ret)
 			goto err_out_free_irq;

Re: [PATCH 2/2] ethernet: lpc_eth: Use NULL to compare with pointer-typed value rather than 0

From: zhong jiang <hidden>
Date: 2018-08-18 05:59:42

On 2018/8/17 23:29, Vladimir Zapolskiy wrote:
Hi zhong jiang,

On 08/17/2018 04:18 PM, zhong jiang wrote:
quoted
We should use NULL to compare with pointer-typed value rather than 0.
The issue is detected with the help of Coccinelle.
---
 drivers/net/ethernet/nxp/lpc_eth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index 08381ef..04d9e62 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -1350,7 +1350,7 @@ static int lpc_eth_drv_probe(struct platform_device *pdev)
 				"IRAM not big enough for net buffers, using SDRAM instead.\n");
 	}
 
-	if (pldat->dma_buff_base_v == 0) {
+	if (pldat->dma_buff_base_v == NULL) {
That's a valid finding, but please use a common 0 and NULL comparison in form of

	if (!pldat->dma_buff_base_v)

To the change above please feel free to add my

Acked-by: Vladimir Zapolskiy <vz@mleia.com>
 Thanks, Will do in v2
quoted
 		ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 		if (ret)
 			goto err_out_free_irq;
.
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