Re: [PATCH V4 1/6] remoteproc: elf_loader: fix loading segment when is_iomem true

[Mathieu Poirier]

On Fri, Sep 10, 2021 at 05:06:16PM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@xxxxxxx>
> 
> It seems luckliy work on i.MX platform, but it is wrong.
> Need use memcpy_toio, not memcpy_fromio.
> 

Lucky or not I just can't understand how this worked in the first place.

> Fixes: 40df0a91b2a52 ("remoteproc: add is_iomem to da_to_va")

SHA tag should be 12 characters.

> Tested-by: Dong Aisheng <aisheng.dong@xxxxxxx> (i.MX8MQ)
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> Reported-by: Dong Aisheng <aisheng.dong@xxxxxxx>
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>

I will add a CC:stable, fix the title, fix the SHA and pick this patch.

> ---
>  drivers/remoteproc/remoteproc_elf_loader.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c
> index 469c52e62faff..44e7f9308f4bc 100644
> --- a/drivers/remoteproc/remoteproc_elf_loader.c
> +++ b/drivers/remoteproc/remoteproc_elf_loader.c
> @@ -220,7 +220,7 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
>  		/* put the segment where the remote processor expects it */
>  		if (filesz) {
>  			if (is_iomem)
> -				memcpy_fromio(ptr, (void __iomem *)(elf_data + offset), filesz);
> +				memcpy_toio((void __iomem *)ptr, elf_data + offset, filesz);
>  			else
>  				memcpy(ptr, elf_data + offset, filesz);
>  		}
> -- 
> 2.25.1
>