linux-kernel - Re: scatterlist: sg_set_buf() argument must be in linear mapping (sha1: ac4e97abce9b80c020e7113325f49e58b7b15e3f)

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Date:	Mon, 22 Jul 2013 11:17:40 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	monstr@...str.eu, Jens Axboe <axboe@...nel.dk>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: scatterlist: sg_set_buf() argument must be in linear mapping (sha1: ac4e97abce9b80c020e7113325f49e58b7b15e3f)

Michal Simek <monstr@...str.eu> writes:
> Hi Rusty and Jens,
>
> I am getting problem with your patch which you have added to the kernel.
> The problem is with my arm zynq remoteproc driver where
> I use dma_declare_coherent_memory() to specify memory for remoteproc
> which is ioremap to the vmalloc area.
>
> Based on that buf addr is not inside ram even this coherent memory is in ram.
> That's why virt_addr_valid(buf) is failing.

But sg_set_buf() calls virt_to_page(buf).  So does that work?

I would think calling sg_set_page() directly would be what you want
here...

Cheers,
Rusty.
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