[PATCH] net: ag71xx: fix return value check in ag71xx_probe()

[PATCH] net: ag71xx: fix return value check in ag71xx_probe()

[Wei Yongjun]

In case of error, the function of_get_mac_address() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Fixes: d51b6ce441d3 ("net: ethernet: add ag71xx driver")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
---
 drivers/net/ethernet/atheros/ag71xx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/atheros/ag71xx.c b/drivers/net/ethernet/atheros/ag71xx.c
index 72a57c6cd254..3088a43e6436 100644
--- a/drivers/net/ethernet/atheros/ag71xx.c
+++ b/drivers/net/ethernet/atheros/ag71xx.c
@@ -1732,9 +1732,9 @@ static int ag71xx_probe(struct platform_device *pdev)
 	ag->stop_desc->next = (u32)ag->stop_desc_dma;
 
 	mac_addr = of_get_mac_address(np);
-	if (mac_addr)
+	if (!IS_ERR(mac_addr))
 		memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
-	if (!mac_addr || !is_valid_ether_addr(ndev->dev_addr)) {
+	if (IS_ERR(mac_addr) || !is_valid_ether_addr(ndev->dev_addr)) {
 		netif_err(ag, probe, ndev, "invalid MAC address, using random address\n");
 		eth_random_addr(ndev->dev_addr);
 	}

Re: [PATCH] net: ag71xx: fix return value check in ag71xx_probe()

[Oleksij Rempel]

On 17.07.19 13:52, Wei Yongjun wrote:
> In case of error, the function of_get_mac_address() returns ERR_PTR()
> and never returns NULL. The NULL test in the return value check should
> be replaced with IS_ERR().
> 
> Fixes: d51b6ce441d3 ("net: ethernet: add ag71xx driver")
> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>

Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>

> ---
>   drivers/net/ethernet/atheros/ag71xx.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/atheros/ag71xx.c b/drivers/net/ethernet/atheros/ag71xx.c
> index 72a57c6cd254..3088a43e6436 100644
> --- a/drivers/net/ethernet/atheros/ag71xx.c
> +++ b/drivers/net/ethernet/atheros/ag71xx.c
> @@ -1732,9 +1732,9 @@ static int ag71xx_probe(struct platform_device *pdev)
>   	ag->stop_desc->next = (u32)ag->stop_desc_dma;
>   
>   	mac_addr = of_get_mac_address(np);
> -	if (mac_addr)
> +	if (!IS_ERR(mac_addr))
>   		memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
> -	if (!mac_addr || !is_valid_ether_addr(ndev->dev_addr)) {
> +	if (IS_ERR(mac_addr) || !is_valid_ether_addr(ndev->dev_addr)) {
>   		netif_err(ag, probe, ndev, "invalid MAC address, using random address\n");
>   		eth_random_addr(ndev->dev_addr);
>   	}
> 
> 
> 
> 

Kind regards,
Oleksij Rempel

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Re: [PATCH] net: ag71xx: fix return value check in ag71xx_probe()

[David Miller]

Please resubmit these two ag71xx patches, you use a different subsystem
prefix in the Subject lines, so you should make them consistent.

Using just "ag71xx: " is perfectly fine.

Thank you.

[PATCH v2] ag71xx: fix return value check in ag71xx_probe()

[Wei Yongjun]

In case of error, the function of_get_mac_address() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Fixes: d51b6ce441d3 ("net: ethernet: add ag71xx driver")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
v1 -> v2: fix subsystem prefix
---
 drivers/net/ethernet/atheros/ag71xx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/atheros/ag71xx.c b/drivers/net/ethernet/atheros/ag71xx.c
index 72a57c6cd254..3088a43e6436 100644
--- a/drivers/net/ethernet/atheros/ag71xx.c
+++ b/drivers/net/ethernet/atheros/ag71xx.c
@@ -1732,9 +1732,9 @@ static int ag71xx_probe(struct platform_device *pdev)
 	ag->stop_desc->next = (u32)ag->stop_desc_dma;
 
 	mac_addr = of_get_mac_address(np);
-	if (mac_addr)
+	if (!IS_ERR(mac_addr))
 		memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
-	if (!mac_addr || !is_valid_ether_addr(ndev->dev_addr)) {
+	if (IS_ERR(mac_addr) || !is_valid_ether_addr(ndev->dev_addr)) {
 		netif_err(ag, probe, ndev, "invalid MAC address, using random address\n");
 		eth_random_addr(ndev->dev_addr);
 	}

Re: [PATCH v2] ag71xx: fix return value check in ag71xx_probe()

[David Miller]

From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Fri, 19 Jul 2019 01:22:06 +0000

> In case of error, the function of_get_mac_address() returns ERR_PTR()
> and never returns NULL. The NULL test in the return value check should
> be replaced with IS_ERR().
> 
> Fixes: d51b6ce441d3 ("net: ethernet: add ag71xx driver")
> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
> Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>

Applied.