Re: [PATCH] mtd: nand: qcom: Fix the node for nand unmap resource

[Pavan Kondeti]

On Thu, Sep 07, 2023 at 02:58:54PM +0530, Bibek Kumar Patro wrote:
> While unmapping the nand resource in case of err_core_clk
> the dev node being passed is res_start instead of nand->dma_base

It is not not dev not but addr argument.

> (where the iova returned from map operation is stored) causing
> failure in unmap operation. Hence modifying the unmap operation
> to pass the nand->base_dma instead of res_start.
> 

Pls simplify this commit description. I think, it was a simple copy/paste
mistake. I would write

"Fix addr argument to dma_unmap_resource() in the error path of probe.
The addr argument should be dma address not physical address."

> Signed-off-by: Bibek Kumar Patro <quic_bibekkum@xxxxxxxxxxx>
> ---
>  drivers/mtd/nand/raw/qcom_nandc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
> index f583022755a2..e085a0f588eb 100644
> --- a/drivers/mtd/nand/raw/qcom_nandc.c
> +++ b/drivers/mtd/nand/raw/qcom_nandc.c
> @@ -3322,7 +3322,7 @@ static int qcom_nandc_probe(struct platform_device *pdev)
>  err_aon_clk:
>  	clk_disable_unprepare(nandc->core_clk);
>  err_core_clk:
> -	dma_unmap_resource(dev, res->start, resource_size(res),
> +	dma_unmap_resource(dev, nandc->base_dma, resource_size(res),
>  			   DMA_BIDIRECTIONAL, 0);
>  	dev_err(&pdev->dev, "DEBUG: probe failed for nandc module\n");
>  	return ret;

Since you are fixing a bug introduced by a previous commit, you should
add Fixes tag like below. Refer to Documentation [1].

Fixes: 7330fc505af4 ("mtd: rawnand: qcom: stop using phys_to_dma()")

[1] https://docs.kernel.org/process/submitting-patches.html#using-reported-by-tested-by-reviewed-by-suggested-by-and-fixes

Thanks,
Pavan