[PATCH] net: phy: fix error check return value of phy_read()

[PATCH] net: phy: fix error check return value of phy_read()

[cgel.zte]

From: Lv Ruyi <lv.ruyi@zte.com.cn>

phy_read() returns a negative number if there's an error, but the
error-checking code in the bcm87xx driver's config_intr function
triggers if phy_read() returns non-zero.  Correct that.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn>
---
 drivers/net/phy/bcm87xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/bcm87xx.c b/drivers/net/phy/bcm87xx.c
index 313563482690..e62b53718010 100644
--- a/drivers/net/phy/bcm87xx.c
+++ b/drivers/net/phy/bcm87xx.c
@@ -146,7 +146,7 @@ static int bcm87xx_config_intr(struct phy_device *phydev)
 
 	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
 		err = phy_read(phydev, BCM87XX_LASI_STATUS);
-		if (err)
+		if (err < 0)
 			return err;
 
 		reg |= 1;
-- 
2.25.1

Re: [PATCH] net: phy: fix error check return value of phy_read()

[Andrew Lunn]

On Tue, Apr 19, 2022 at 01:44:39AM +0000, cgel.zte@gmail.com wrote:
> From: Lv Ruyi <lv.ruyi@zte.com.cn>
> 
> phy_read() returns a negative number if there's an error, but the
> error-checking code in the bcm87xx driver's config_intr function
> triggers if phy_read() returns non-zero.  Correct that.
> 
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn>
> ---
>  drivers/net/phy/bcm87xx.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/phy/bcm87xx.c b/drivers/net/phy/bcm87xx.c
> index 313563482690..e62b53718010 100644
> --- a/drivers/net/phy/bcm87xx.c
> +++ b/drivers/net/phy/bcm87xx.c
> @@ -146,7 +146,7 @@ static int bcm87xx_config_intr(struct phy_device *phydev)
>  
>  	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
>  		err = phy_read(phydev, BCM87XX_LASI_STATUS);
> -		if (err)
> +		if (err < 0)
>  			return err;

This should probably have a Fixes: tag, and be for net, not next-next.
Please read the netdev FAQ about the trees, and submittinng fixes for
netdev.

     Andrew

Re: [PATCH] net: phy: fix error check return value of phy_read()

[Florian Fainelli]

On 4/19/2022 5:07 AM, Andrew Lunn wrote:
> On Tue, Apr 19, 2022 at 01:44:39AM +0000, cgel.zte@gmail.com wrote:
>> From: Lv Ruyi <lv.ruyi@zte.com.cn>
>>
>> phy_read() returns a negative number if there's an error, but the
>> error-checking code in the bcm87xx driver's config_intr function
>> triggers if phy_read() returns non-zero.  Correct that.
>>
>> Reported-by: Zeal Robot <zealci@zte.com.cn>
>> Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn>
>> ---
>>   drivers/net/phy/bcm87xx.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/phy/bcm87xx.c b/drivers/net/phy/bcm87xx.c
>> index 313563482690..e62b53718010 100644
>> --- a/drivers/net/phy/bcm87xx.c
>> +++ b/drivers/net/phy/bcm87xx.c
>> @@ -146,7 +146,7 @@ static int bcm87xx_config_intr(struct phy_device *phydev)
>>   
>>   	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
>>   		err = phy_read(phydev, BCM87XX_LASI_STATUS);
>> -		if (err)
>> +		if (err < 0)
>>   			return err;
> 
> This should probably have a Fixes: tag, and be for net, not next-next.
> Please read the netdev FAQ about the trees, and submittinng fixes for
> netdev.

Yes, it should be:

Fixes: 15772e4ddf3f ("net: phy: broadcom: remove use of ack_interrupt()")

Also, please subject this change properly with:

net: phy: bcm87xx: Added missing error checking

Thank you
-- 
Florian