Messages in this thread | | | Date | Fri, 18 Sep 2020 12:01:52 +0100 | From | Mark Brown <> | Subject | Re: [PATCH] ASoC: Use memset_io to access I/O memory |
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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. [unhandled content-type:application/pgp-signature] | |