[PATCH] ixp4xx_eth: fix error check return value of platform_get_irq()

[PATCH] ixp4xx_eth: fix error check return value of platform_get_irq()

[cgel.zte]

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

platform_get_irq() return negative value on failure, so null check of
return value is incorrect. Fix it by comparing whether it is less than
zero.

Fixes: 9055a2f59162 ("ixp4xx_eth: make ptp support a platform driver")
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn>
---
 drivers/net/ethernet/xscale/ptp_ixp46x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/xscale/ptp_ixp46x.c b/drivers/net/ethernet/xscale/ptp_ixp46x.c
index 1f382777aa5a..9abbdb71e629 100644
--- a/drivers/net/ethernet/xscale/ptp_ixp46x.c
+++ b/drivers/net/ethernet/xscale/ptp_ixp46x.c
@@ -271,7 +271,7 @@ static int ptp_ixp_probe(struct platform_device *pdev)
 	ixp_clock.master_irq = platform_get_irq(pdev, 0);
 	ixp_clock.slave_irq = platform_get_irq(pdev, 1);
 	if (IS_ERR(ixp_clock.regs) ||
-	    !ixp_clock.master_irq || !ixp_clock.slave_irq)
+	    ixp_clock.master_irq < 0 || ixp_clock.slave_irq < 0)
 		return -ENXIO;
 
 	ixp_clock.caps = ptp_ixp_caps;
-- 
2.25.1

Re: [PATCH] ixp4xx_eth: fix error check return value of platform_get_irq()

[Linus Walleij]

On Tue, Apr 12, 2022 at 10:51 AM <cgel.zte@gmail.com> wrote:

> From: Lv Ruyi <lv.ruyi@zte.com.cn>
>
> platform_get_irq() return negative value on failure, so null check of
> return value is incorrect. Fix it by comparing whether it is less than
> zero.
>
> Fixes: 9055a2f59162 ("ixp4xx_eth: make ptp support a platform driver")
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn>

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

Re: [PATCH] ixp4xx_eth: fix error check return value of platform_get_irq()

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@kernel.org>:

On Tue, 12 Apr 2022 08:51:26 +0000 you wrote:
> From: Lv Ruyi <lv.ruyi@zte.com.cn>
> 
> platform_get_irq() return negative value on failure, so null check of
> return value is incorrect. Fix it by comparing whether it is less than
> zero.
> 
> Fixes: 9055a2f59162 ("ixp4xx_eth: make ptp support a platform driver")
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn>
> 
> [...]

Here is the summary with links:
  - ixp4xx_eth: fix error check return value of platform_get_irq()
    https://git.kernel.org/netdev/net-next/c/f45ba67eb74a

You are awesome, thank you!
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