linux-kernel - Re: [PATCH v2] dmaengine: axi-dmac: Request IRQ with IRQF

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Message-ID: <20180427051115.GX6014@localhost>
Date:   Fri, 27 Apr 2018 10:41:15 +0530
From:   Vinod Koul <vinod.koul@...el.com>
To:     Moritz Fischer <mdf@...nel.org>
Cc:     linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
        dan.j.williams@...el.com, lars@...afoo.de
Subject: Re: [PATCH v2] dmaengine: axi-dmac: Request IRQ with IRQF_SHARED

On Thu, Apr 26, 2018 at 10:40:00AM -0700, Moritz Fischer wrote:
> Request IRQ with IRQF_SHARED flag. This works since the interrupt
> handler already checks if there is an actual IRQ pending and returns
> IRQ_NONE otherwise.

hmmm what are we trying to fix here? Is your device on a shared line or not?

> 
> Acked-by: Lars-Peter Clausen <lars@...afoo.de>
> Signed-off-by: Moritz Fischer <mdf@...nel.org>
> ---
> Changes from v1:
> - Added Lars' Acked-by
> - Dropped patch [1/2] and changed accordingly
> ---
>  drivers/dma/dma-axi-dmac.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c
> index 2419fe524daa..15b2453d2647 100644
> --- a/drivers/dma/dma-axi-dmac.c
> +++ b/drivers/dma/dma-axi-dmac.c
> @@ -687,7 +687,7 @@ static int axi_dmac_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto err_unregister_device;
>  
> -	ret = request_irq(dmac->irq, axi_dmac_interrupt_handler, 0,
> +	ret = request_irq(dmac->irq, axi_dmac_interrupt_handler, IRQF_SHARED,
>  		dev_name(&pdev->dev), dmac);
>  	if (ret)
>  		goto err_unregister_of;
> -- 
> 2.17.0
> 

-- 
~Vinod