From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue, 19 Apr 2011 17:54:44 +0000 (-0700)
Subject: Revert "[media] V4L: videobuf, don't use dma addr as physical"
X-Git-Tag: v2.6.39-rc5~45
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=71460af58f8565110160283849db4d6bf7e1efa1;p=pandora-kernel.git

Revert "[media] V4L: videobuf, don't use dma addr as physical"

This reverts commit 35d9f510b67b10338161aba6229d4f55b4000f5b.

Quoth Jiri Slaby:
 "It fixes mmap when IOMMU is used on x86 only, but breaks architectures
  like ARM or PPC where virt_to_phys(dma_alloc_coherent) doesn't work.
  We need there dma_mmap_coherent or similar (the trickery what
  snd_pcm_default_mmap does but in some saner way).  But this cannot be
  done at this phase."

Requested-by: Jiri Slaby <jslaby@suse.cz>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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