[PATCH RFC] dmaengine: fsl-edma: Fix return code for unhandled interrupts

[Stefan Wahren]

Hi Frank,
hi Joy,

Am 24.04.25 um 13:48 schrieb Stefan Wahren:
> For fsl,imx93-edma4 two DMA channels share the same interrupt.
> So in case fsl_edma3_tx_handler is called for the "wrong"
> channel, the return code must be IRQ_NONE. This signalize that
> the interrupt wasn't handled.
>
> Fixes: 72f5801a4e2b ("dmaengine: fsl-edma: integrate v3 support")
> Signed-off-by: Stefan Wahren <wahrenst at gmx.net>
any comments on this?

Thanks
> ---
>
> Hi,
> this issue was found on a custom i.MX93 board. This patch has been
> tested on the same platform.
>
>   drivers/dma/fsl-edma-main.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/dma/fsl-edma-main.c b/drivers/dma/fsl-edma-main.c
> index 756d67325db5..66bfa28d984e 100644
> --- a/drivers/dma/fsl-edma-main.c
> +++ b/drivers/dma/fsl-edma-main.c
> @@ -57,7 +57,7 @@ static irqreturn_t fsl_edma3_tx_handler(int irq, void *dev_id)
>   
>   	intr = edma_readl_chreg(fsl_chan, ch_int);
>   	if (!intr)
> -		return IRQ_HANDLED;
> +		return IRQ_NONE;
>   
>   	edma_writel_chreg(fsl_chan, 1, ch_int);
>