[PATCH 1/2 v2] misc: aspeed-lpc-snoop: Fix platform_get_irq's error checking

[PATCH 1/2 v2] misc: aspeed-lpc-snoop: Fix platform_get_irq's error checking

[Arvind Yadav]

The platform_get_irq() function returns negative if an error occurs.
zero or positive number on success. platform_get_irq() error checking
for zero is not correct.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
---
changes in v2 :
              Add failure case '<= 0' instead of '< 0'. IRQ 0 is not valid.

 drivers/misc/aspeed-lpc-snoop.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/aspeed-lpc-snoop.c b/drivers/misc/aspeed-lpc-snoop.c
index cb78c98..14c3c90 100644
--- a/drivers/misc/aspeed-lpc-snoop.c
+++ b/drivers/misc/aspeed-lpc-snoop.c
@@ -115,8 +115,8 @@ static int aspeed_lpc_snoop_config_irq(struct aspeed_lpc_snoop *lpc_snoop,
 	int rc;
 
 	lpc_snoop->irq = platform_get_irq(pdev, 0);
-	if (!lpc_snoop->irq)
-		return -ENODEV;
+	if (lpc_snoop->irq <= 0)
+		return lpc_snoop->irq;
 
 	rc = devm_request_irq(dev, lpc_snoop->irq,
 			      aspeed_lpc_snoop_irq, IRQF_SHARED,
-- 
2.7.4

[PATCH 2/2 v2] misc: atmel-ssc: Fix platform_get_irq's error checking

[Arvind Yadav]

The platform_get_irq() function returns negative if an error occurs.
zero or positive number on success. platform_get_irq() error checking
for zero is not correct.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
---
changes in v2 :
              Add failure case '<= 0' instead of '< 0'. IRQ 0 is not valid.

 drivers/misc/atmel-ssc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c
index b2a0340..9d9eeae 100644
--- a/drivers/misc/atmel-ssc.c
+++ b/drivers/misc/atmel-ssc.c
@@ -235,9 +235,9 @@ static int ssc_probe(struct platform_device *pdev)
 	clk_disable_unprepare(ssc->clk);
 
 	ssc->irq = platform_get_irq(pdev, 0);
-	if (!ssc->irq) {
+	if (ssc->irq <= 0) {
 		dev_dbg(&pdev->dev, "could not get irq\n");
-		return -ENXIO;
+		return ssc->irq;
 	}
 
 	spin_lock(&user_lock);
-- 
2.7.4

Re: [PATCH 2/2 v2] misc: atmel-ssc: Fix platform_get_irq's error checking

[Nicolas Ferre]

On 18/11/2017 at 10:10, Arvind Yadav wrote:
> The platform_get_irq() function returns negative if an error occurs.
> zero or positive number on success. platform_get_irq() error checking
> for zero is not correct.
> 
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
> ---
> changes in v2 :
>               Add failure case '<= 0' instead of '< 0'. IRQ 0 is not valid.
> 
>  drivers/misc/atmel-ssc.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c
> index b2a0340..9d9eeae 100644
> --- a/drivers/misc/atmel-ssc.c
> +++ b/drivers/misc/atmel-ssc.c
> @@ -235,9 +235,9 @@ static int ssc_probe(struct platform_device *pdev)
>  	clk_disable_unprepare(ssc->clk);
>  
>  	ssc->irq = platform_get_irq(pdev, 0);
> -	if (!ssc->irq) {
> +	if (ssc->irq <= 0) {
>  		dev_dbg(&pdev->dev, "could not get irq\n");
> -		return -ENXIO;
> +		return ssc->irq;

if ssc->irq = 0, I believe that returning 0 is not the right thing to do.

Regards,

>  	}
>  
>  	spin_lock(&user_lock);
> 


-- 
Nicolas Ferre