The interrupt controller supplying the Wake-on-LAN interrupt line maybe
modular on some platforms (irq-bcm7038-l1.c) and might be probed at a
later time than the GENET driver. We need to specifically check for
-EPROBE_DEFER and propagate that error to ensure that we eventually
fetch the interrupt descriptor.

Fixes: 9deb48b53e7f ("bcmgenet: add WOL IRQ check")
Fixes: 5b1f0e62941b ("net: bcmgenet: Avoid touching non-existent interrupt")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/net/ethernet/broadcom/genet/bcmgenet.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index bf1ec8fdc2ad..e87e46c47387 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -3999,6 +3999,10 @@ static int bcmgenet_probe(struct platform_device *pdev)
 		goto err;
 	}
 	priv->wol_irq = platform_get_irq_optional(pdev, 2);
+	if (priv->wol_irq == -EPROBE_DEFER) {
+		err = priv->wol_irq;
+		goto err;
+	}
 
 	priv->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(priv->base)) {
-- 
2.25.1

Hello:

This patch was applied to netdev/net.git (master)
by Paolo Abeni <pabeni@redhat.com>:

On Tue, 10 May 2022 20:17:51 -0700 you wrote:
> The interrupt controller supplying the Wake-on-LAN interrupt line maybe
> modular on some platforms (irq-bcm7038-l1.c) and might be probed at a
> later time than the GENET driver. We need to specifically check for
> -EPROBE_DEFER and propagate that error to ensure that we eventually
> fetch the interrupt descriptor.
> 
> Fixes: 9deb48b53e7f ("bcmgenet: add WOL IRQ check")
> Fixes: 5b1f0e62941b ("net: bcmgenet: Avoid touching non-existent interrupt")
> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
> 
> [...]

Here is the summary with links:
  - [net] net: bcmgenet: Check for Wake-on-LAN interrupt probe deferral
    https://git.kernel.org/netdev/net/c/6b77c06655b8

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html

Am 11.05.22 um 05:17 schrieb Florian Fainelli:
> The interrupt controller supplying the Wake-on-LAN interrupt line maybe
> modular on some platforms (irq-bcm7038-l1.c) and might be probed at a
> later time than the GENET driver. We need to specifically check for
> -EPROBE_DEFER and propagate that error to ensure that we eventually
> fetch the interrupt descriptor.
>
> Fixes: 9deb48b53e7f ("bcmgenet: add WOL IRQ check")
> Fixes: 5b1f0e62941b ("net: bcmgenet: Avoid touching non-existent interrupt")
> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Stefan Wahren <stefan.wahren@i2se.com>
> ---
>   drivers/net/ethernet/broadcom/genet/bcmgenet.c | 4 ++++
>   1 file changed, 4 insertions(+)
>
> diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
> index bf1ec8fdc2ad..e87e46c47387 100644
> --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
> +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
> @@ -3999,6 +3999,10 @@ static int bcmgenet_probe(struct platform_device *pdev)
>   		goto err;
>   	}
>   	priv->wol_irq = platform_get_irq_optional(pdev, 2);
> +	if (priv->wol_irq == -EPROBE_DEFER) {
> +		err = priv->wol_irq;
> +		goto err;
> +	}
>   
>   	priv->base = devm_platform_ioremap_resource(pdev, 0);
>   	if (IS_ERR(priv->base)) {