[PATCH 1/2] crypto: amlogic: Fix IRQ handler return value and fallthrough logic

[PATCH 1/2] crypto: amlogic: Fix IRQ handler return value and fallthrough logic

[Mohamad Raizudeen]

In irqreturn_t_meson_irq_handler(), when an interrupt matches a flow
but the status register is empty, the driver prints an error but
doesn't return. It falls through the loop and incorrectly prints an
`unknown irq` message.

Fix this by returning IRQ_HANDLED immediately after the error print.

Additionally, the handler returns IRQ_HANDLED for genuinely unknown
interrupts. This masks false interrupts and prevents the kernel from
detecting interrupts. Return IRQ_NONE instead for unhandled
interrupts.

Cc: stable@vger.kernel.org
Fixes: 48fe583fe5417 ("crypto: amlogic - Add crypto accelerator for amlogic GXL")
Signed-off-by: Mohamad Raizudeen <raizudeen.kerneldev@gmail.com>
---
 drivers/crypto/amlogic/amlogic-gxl-core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/amlogic/amlogic-gxl-core.c b/drivers/crypto/amlogic/amlogic-gxl-core.c
index 6cb33949915f..302b398405e2 100644
--- a/drivers/crypto/amlogic/amlogic-gxl-core.c
+++ b/drivers/crypto/amlogic/amlogic-gxl-core.c
@@ -38,11 +38,12 @@ static irqreturn_t meson_irq_handler(int irq, void *data)
 				return IRQ_HANDLED;
 			}
 			dev_err(mc->dev, "%s %d Got irq for flow %d but ctrl is empty\n", __func__, irq, flow);
+			return IRQ_HANDLED; 
 		}
 	}
 
 	dev_err(mc->dev, "%s %d from unknown irq\n", __func__, irq);
-	return IRQ_HANDLED;
+	return IRQ_NONE;
 }
 
 static struct meson_alg_template mc_algs[] = {
-- 
2.53.0


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Re: [PATCH 1/2] crypto: amlogic: Fix IRQ handler return value and fallthrough logic

[Mohamad Raizudeen]

On Fri, Aug 21, 2026 at 08:42:43PM +0530, Mohamad Raizudeen wrote:
> In irqreturn_t_meson_irq_handler(), when an interrupt matches a flow
> but the status register is empty, the driver prints an error but
> doesn't return. It falls through the loop and incorrectly prints an
> `unknown irq` message.
> 
> Fix this by returning IRQ_HANDLED immediately after the error print.
> 
> Additionally, the handler returns IRQ_HANDLED for genuinely unknown
> interrupts. This masks false interrupts and prevents the kernel from
> detecting interrupts. Return IRQ_NONE instead for unhandled
> interrupts.
> 
> Cc: stable@vger.kernel.org
> Fixes: 48fe583fe5417 ("crypto: amlogic - Add crypto accelerator for amlogic GXL")
> Signed-off-by: Mohamad Raizudeen <raizudeen.kerneldev@gmail.com>
> ---
>  drivers/crypto/amlogic/amlogic-gxl-core.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/crypto/amlogic/amlogic-gxl-core.c b/drivers/crypto/amlogic/amlogic-gxl-core.c
> index 6cb33949915f..302b398405e2 100644
> --- a/drivers/crypto/amlogic/amlogic-gxl-core.c
> +++ b/drivers/crypto/amlogic/amlogic-gxl-core.c
> @@ -38,11 +38,12 @@ static irqreturn_t meson_irq_handler(int irq, void *data)
>  				return IRQ_HANDLED;
>  			}
>  			dev_err(mc->dev, "%s %d Got irq for flow %d but ctrl is empty\n", __func__, irq, flow);
> +			return IRQ_HANDLED; 
>  		}
>  	}
>  
>  	dev_err(mc->dev, "%s %d from unknown irq\n", __func__, irq);
> -	return IRQ_HANDLED;
> +	return IRQ_NONE;
>  }
>  
>  static struct meson_alg_template mc_algs[] = {
> -- 
> 2.53.0
>
Hi,

Just following up on this patch. Please let me know if you have any
feedback or if further changes are needed.

Thanks,
Mohamad Raizudeen

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