From: Jiri Slaby <jslaby@suse.cz>
Date: Mon, 28 Feb 2011 09:37:02 +0000 (-0300)
Subject: [media] V4L: videobuf, don't use dma addr as physical
X-Git-Tag: v2.6.39-rc1~86^2~86
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=35d9f510b67b10338161aba6229d4f55b4000f5b;p=pandora-kernel.git

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

mem->dma_handle is a dma address obtained by dma_alloc_coherent which
needn't be a physical address in presence of IOMMU, as
a hardware IOMMU can (and most likely) will return a bus address where
physical != bus address.

So ensure we are remapping (remap_pfn_range) the right page in
__videobuf_mmap_mapper by using virt_to_phys(mem->vaddr) and not
mem->dma_handle.

While at it, use PFN_DOWN instead of explicit shift.

[mchehab@redhat.com: Fix compilation breakage due to the lack of a comma]
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

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