Subject: Re: [PATCH 21/22] mmc: wbsd: Use dma_alloc_noncoherent() for dma buffer

From: Baoquan He <[email-masked]>
Date: Sun, 20 Feb 2022 16:40:44 +0800

On 02/19/22 at 08:17am, Christoph Hellwig wrote:
> On Sat, Feb 19, 2022 at 08:52:20AM +0800, Baoquan He wrote:
> >  	if (request_dma(dma, DRIVER_NAME))
> >  		goto err;
> >  
> > +	dma_set_mask_and_coherent(mmc_dev(host->mmc), DMA_BIT_MASK(24));
> 
> This also sets the streaming mask, but the driver doesn't seem to make
> use of that.  Please document it in the commit log.

Thanks for reviewing. I will change it to dma_set_mask(), and describe
this change in patch log.

> 
> Also setting smaller than 32 bit masks can fail, so this should have
> error handling.

OK, will check and add error handling.