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From: Pavel Borzenkov <pavel@devio.us>
Newsgroups: comp.os.linux.development.system
Subject: Re: mmap dma buffer
Date: Thu, 7 Jul 2011 10:02:40 +0000 (UTC)
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On 2011-07-07, Pavel Borzenkov <pavel@devio.us> wrote:
>
> You can't convert address returned by pci_alloc_consistent() using
> virt_to_phys() macro. This macro correctly works only for the kernel virtual
> addresses. And this is not needed, actually, because pci_alloc_consistent()
> function returns physical address of the allocated memory in its third
> argument.
>

Sorry. virt_to_phys() works correctly only for kernel *logical* addresses, not
virtual.

-- 
Pavel