NO_IRQ is used to check the return of irq_of_parse_and_map().

On some architecture NO_IRQ is 0, on other architectures it is -1.

irq_of_parse_and_map() returns 0 on error, independent of NO_IRQ.

So use 0 instead of using NO_IRQ.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 drivers/mtd/nand/raw/mpc5121_nfc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/mpc5121_nfc.c b/drivers/mtd/nand/raw/mpc5121_nfc.c
index 800d774aed8e..f68349cb7824 100644
--- a/drivers/mtd/nand/raw/mpc5121_nfc.c
+++ b/drivers/mtd/nand/raw/mpc5121_nfc.c
@@ -663,7 +663,7 @@ static int mpc5121_nfc_probe(struct platform_device *op)
 	}
 
 	prv->irq = irq_of_parse_and_map(dn, 0);
-	if (prv->irq == NO_IRQ) {
+	if (!prv->irq) {
 		dev_err(dev, "Error mapping IRQ!\n");
 		return -EINVAL;
 	}
-- 
2.37.1

On Thu, 2022-10-06 at 05:29:12 UTC, Christophe Leroy wrote:
> NO_IRQ is used to check the return of irq_of_parse_and_map().
> 
> On some architecture NO_IRQ is 0, on other architectures it is -1.
> 
> irq_of_parse_and_map() returns 0 on error, independent of NO_IRQ.
> 
> So use 0 instead of using NO_IRQ.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks.

Miquel

Hi Christophe,

christophe.leroy@csgroup.eu wrote on Thu,  6 Oct 2022 07:29:12 +0200:

> NO_IRQ is used to check the return of irq_of_parse_and_map().
> 
> On some architecture NO_IRQ is 0, on other architectures it is -1.
> 
> irq_of_parse_and_map() returns 0 on error, independent of NO_IRQ.
> 
> So use 0 instead of using NO_IRQ.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>

Deserves Fixes and Cc:stable tags, isn't it?

> ---
>  drivers/mtd/nand/raw/mpc5121_nfc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/mpc5121_nfc.c b/drivers/mtd/nand/raw/mpc5121_nfc.c
> index 800d774aed8e..f68349cb7824 100644
> --- a/drivers/mtd/nand/raw/mpc5121_nfc.c
> +++ b/drivers/mtd/nand/raw/mpc5121_nfc.c
> @@ -663,7 +663,7 @@ static int mpc5121_nfc_probe(struct platform_device *op)
>  	}
>  
>  	prv->irq = irq_of_parse_and_map(dn, 0);
> -	if (prv->irq == NO_IRQ) {
> +	if (!prv->irq) {
>  		dev_err(dev, "Error mapping IRQ!\n");
>  		return -EINVAL;
>  	}


Thanks,
Miquèl

Hi Miquel

Le 06/10/2022 à 09:47, Miquel Raynal a écrit :
> Hi Christophe,
> 
> christophe.leroy@csgroup.eu wrote on Thu,  6 Oct 2022 07:29:12 +0200:
> 
>> NO_IRQ is used to check the return of irq_of_parse_and_map().
>>
>> On some architecture NO_IRQ is 0, on other architectures it is -1.
>>
>> irq_of_parse_and_map() returns 0 on error, independent of NO_IRQ.
>>
>> So use 0 instead of using NO_IRQ.
>>
>> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
> 
> Deserves Fixes and Cc:stable tags, isn't it?

I don't think so, because the only user today is powerpc which defines 
NO_IRQ as 0.

In the stable-kernel-rules.rst it is said:

  - It must fix a real bug that bothers people (not a, "This could be a
    problem..." type thing).


> 
>> ---
>>   drivers/mtd/nand/raw/mpc5121_nfc.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/mtd/nand/raw/mpc5121_nfc.c b/drivers/mtd/nand/raw/mpc5121_nfc.c
>> index 800d774aed8e..f68349cb7824 100644
>> --- a/drivers/mtd/nand/raw/mpc5121_nfc.c
>> +++ b/drivers/mtd/nand/raw/mpc5121_nfc.c
>> @@ -663,7 +663,7 @@ static int mpc5121_nfc_probe(struct platform_device *op)
>>   	}
>>   
>>   	prv->irq = irq_of_parse_and_map(dn, 0);
>> -	if (prv->irq == NO_IRQ) {
>> +	if (!prv->irq) {
>>   		dev_err(dev, "Error mapping IRQ!\n");
>>   		return -EINVAL;
>>   	}
> 
> 
> Thanks,
> Miquèl