linux-kernel - Re: [PATCH 1/2] dmaengine: xilinx

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Date:   Fri, 1 Jul 2022 17:20:58 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Swati Agarwal <swati.agarwal@...inx.com>
Cc:     lars@...afoo.de, adrianml@...mnos.upm.es, libaokun1@...wei.com,
        marex@...x.de, dmaengine@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        harini.katakam@...inx.com, radhey.shyam.pandey@...inx.com,
        michal.simek@...inx.com
Subject: Re: [PATCH 1/2] dmaengine: xilinx_dma: Fix probe error cleanup

On 24-06-22, 12:05, Swati Agarwal wrote:
> When probe fails remove dma channel resources and disable clocks in
> accordance with the order of resources allocated .

Ok this looks fine and the changes below..
> 
> Add missing cleanup in devm_platform_ioremap_resource(), xlnx,num-fstores
> property.

Where is this part?

> 
> Signed-off-by: Swati Agarwal <swati.agarwal@...inx.com>
> Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
> ---
>  drivers/dma/xilinx/xilinx_dma.c | 14 ++++++++------
>  1 file changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
> index cd62bbb50e8b..fbf341e8c36f 100644
> --- a/drivers/dma/xilinx/xilinx_dma.c
> +++ b/drivers/dma/xilinx/xilinx_dma.c
> @@ -3160,8 +3160,10 @@ static int xilinx_dma_probe(struct platform_device *pdev)
>  
>  	/* Request and map I/O memory */
>  	xdev->regs = devm_platform_ioremap_resource(pdev, 0);
> -	if (IS_ERR(xdev->regs))
> -		return PTR_ERR(xdev->regs);
> +	if (IS_ERR(xdev->regs)) {
> +		err = PTR_ERR(xdev->regs);
> +		goto disable_clks;
> +	}
>  
>  	/* Retrieve the DMA engine properties from the device tree */
>  	xdev->max_buffer_len = GENMASK(XILINX_DMA_MAX_TRANS_LEN_MAX - 1, 0);
> @@ -3190,7 +3192,7 @@ static int xilinx_dma_probe(struct platform_device *pdev)
>  		if (err < 0) {
>  			dev_err(xdev->dev,
>  				"missing xlnx,num-fstores property\n");
> -			return err;
> +			goto disable_clks;
>  		}
>  
>  		err = of_property_read_u32(node, "xlnx,flush-fsync",
> @@ -3259,7 +3261,7 @@ static int xilinx_dma_probe(struct platform_device *pdev)
>  	for_each_child_of_node(node, child) {
>  		err = xilinx_dma_child_probe(xdev, child);
>  		if (err < 0)
> -			goto disable_clks;
> +			goto error;
>  	}
>  
>  	if (xdev->dma_config->dmatype == XDMA_TYPE_VDMA) {
> @@ -3294,12 +3296,12 @@ static int xilinx_dma_probe(struct platform_device *pdev)
>  
>  	return 0;
>  
> -disable_clks:
> -	xdma_disable_allclks(xdev);
>  error:
>  	for (i = 0; i < xdev->dma_config->max_channels; i++)
>  		if (xdev->chan[i])
>  			xilinx_dma_chan_remove(xdev->chan[i]);
> +disable_clks:
> +	xdma_disable_allclks(xdev);
>  
>  	return err;
>  }
> -- 
> 2.17.1

-- 
~Vinod