linux-kernel - Re: [PATCH V4 04/10] dmaengine: qcom_hidma: configure DMA and MSI for OF

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Date:   Sat, 1 Oct 2016 11:47:11 +0530
From:   Vinod Koul <vinod.koul@...el.com>
To:     Sinan Kaya <okaya@...eaurora.org>
Cc:     dmaengine@...r.kernel.org, timur@...eaurora.org,
        devicetree@...r.kernel.org, cov@...eaurora.org, jcm@...hat.com,
        agross@...eaurora.org, arnd@...db.de,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Dan Williams <dan.j.williams@...el.com>,
        Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V4 04/10] dmaengine: qcom_hidma: configure DMA and MSI
 for OF

On Wed, Sep 28, 2016 at 10:12:41PM -0400, Sinan Kaya wrote:
> Configure the DMA bindings for the device tree based firmware.
> 
> Signed-off-by: Sinan Kaya <okaya@...eaurora.org>
> ---
>  drivers/dma/qcom/hidma_mgmt.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/qcom/hidma_mgmt.c b/drivers/dma/qcom/hidma_mgmt.c
> index 82f36e4..e8f6b84 100644
> --- a/drivers/dma/qcom/hidma_mgmt.c
> +++ b/drivers/dma/qcom/hidma_mgmt.c
> @@ -375,8 +375,11 @@ static int __init hidma_mgmt_of_populate_channels(struct device_node *np)
>  			ret = PTR_ERR(new_pdev);
>  			goto out;
>  		}
> +		of_node_get(child);
> +		new_pdev->dev.of_node = child;
>  		of_dma_configure(&new_pdev->dev, child);
> -
> +		of_msi_configure(&new_pdev->dev, child);
> +		of_node_put(child);

should this be done unconditionally? Dont we needto call this only for
platforms with msi?

>  		kfree(res);
>  		res = NULL;
>  	}
> -- 
> 1.9.1
> 

-- 
~Vinod