Re: [PATCH] ASoC: Use memset_io to access I/O memory

[Mark Brown]

On Fri, Sep 18, 2020 at 06:00:19PM +0800, Shane Chien wrote:

>  	/* clear the buffer for avoiding possible kernel info leaks */
>  	if (runtime->dma_area && !substream->ops->copy_user)
> -		memset(runtime->dma_area, 0, runtime->dma_bytes);
> +		memset_io(runtime->dma_area, 0, runtime->dma_bytes);

This is regular RAM that will be accessed by the devices rather than
memory mapped regions provided by devices, the _io variants are normally
for memory mapped regions on devices.

Attachment: signature.asc
Description: PGP signature