[PATCH] soc: aspeed: Fix IRQ check in aspeed_lpc_snoop_config_irq

[PATCH] soc: aspeed: Fix IRQ check in aspeed_lpc_snoop_config_irq

[Miaoqian Lin]

platform_get_irq() returns negative error number instead 0 on failure.
And the doc of platform_get_irq() provides a usage example:

    int irq = platform_get_irq(pdev, 0);
    if (irq < 0)
        return irq;

Fix the check of return value to catch errors correctly.

Fixes: 524feb799408 ("soc: add aspeed folder and misc drivers")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 drivers/soc/aspeed/aspeed-lpc-snoop.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/soc/aspeed/aspeed-lpc-snoop.c b/drivers/soc/aspeed/aspeed-lpc-snoop.c
index eceeaf8dfbeb..c4a03b3a5cf8 100644
--- a/drivers/soc/aspeed/aspeed-lpc-snoop.c
+++ b/drivers/soc/aspeed/aspeed-lpc-snoop.c
@@ -167,8 +167,8 @@ 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,
-- 
2.17.1

[PATCH] soc: aspeed: Fix IRQ check in aspeed_lpc_snoop_config_irq

[ChiaWei Wang]

> From: Miaoqian Lin <linmq006@gmail.com>
> Sent: Friday, January 14, 2022 2:44 PM
> 
> platform_get_irq() returns negative error number instead 0 on failure.
> And the doc of platform_get_irq() provides a usage example:
> 
>     int irq = platform_get_irq(pdev, 0);
>     if (irq < 0)
>         return irq;
> 
> Fix the check of return value to catch errors correctly.
> 
> Fixes: 524feb799408 ("soc: add aspeed folder and misc drivers")
> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>

Reviewed-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>

Thanks.

[PATCH] soc: aspeed: Fix IRQ check in aspeed_lpc_snoop_config_irq

[Patrick Venture]

On Thu, Jan 13, 2022 at 10:44 PM Miaoqian Lin <linmq006@gmail.com> wrote:

> platform_get_irq() returns negative error number instead 0 on failure.
> And the doc of platform_get_irq() provides a usage example:
>
>     int irq = platform_get_irq(pdev, 0);
>     if (irq < 0)
>         return irq;
>
> Fix the check of return value to catch errors correctly.
>
> Fixes: 524feb799408 ("soc: add aspeed folder and misc drivers")
> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
>

Signed-off-by: Patrick Venture <venture@google.com>


> ---
>  drivers/soc/aspeed/aspeed-lpc-snoop.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/soc/aspeed/aspeed-lpc-snoop.c
> b/drivers/soc/aspeed/aspeed-lpc-snoop.c
> index eceeaf8dfbeb..c4a03b3a5cf8 100644
> --- a/drivers/soc/aspeed/aspeed-lpc-snoop.c
> +++ b/drivers/soc/aspeed/aspeed-lpc-snoop.c
> @@ -167,8 +167,8 @@ 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,
> --
> 2.17.1
>
>
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