2022-01-14 06:44:08

by Miaoqian Lin

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

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 <[email protected]>
---
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

2022-01-17 11:07:20

by ChiaWei Wang

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

> From: Miaoqian Lin <[email protected]>
> 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 <[email protected]>

Reviewed-by: Chia-Wei Wang <[email protected]>

Thanks.