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media: vb2: Fix videobuf2 to map correct area

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[ Upstream commit d13a0139d7874a0577b5955d6eed895517d23b72 ]

Fixes vb2_vmalloc_get_userptr() to ioremap correct area.
Since the current code does ioremap the page address, if the offset > 0,
it does not do ioremap the last page and results in kernel panic.

This fixes to pass the size + offset to ioremap so that ioremap
can map correct area. Also, this uses __pfn_to_phys() to get the physical
address of given PFN.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reported-by: Takao Orito <orito.takao@socionext.com>
Reported-by: Fumihiro ATSUMI <atsumi@infinitegra.co.jp>
Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Masami Hiramatsu 2018-02-06 03:02:23 -05:00 committed by Greg Kroah-Hartman
parent 81173a5863
commit 8cfcd5bbb7
1 changed files with 1 additions and 1 deletions
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2
drivers/media/v4l2-core/videobuf2-vmalloc.c
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@ -106,7 +106,7 @@ static void *vb2_vmalloc_get_userptr(struct device *dev, unsigned long vaddr,
if (nums[i-1] + 1 != nums[i])
goto fail_map;
buf->vaddr = (__force void *)
ioremap_nocache(nums[0] << PAGE_SHIFT, size);
ioremap_nocache(__pfn_to_phys(nums[0]), size + offset);
} else {
buf->vaddr = vm_map_ram(frame_vector_pages(vec), n_pages, -1,
PAGE_KERNEL);