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vm: convert snd_pcm_lib_mmap_iomem() to vm_iomap_memory() helper 

This is my example conversion of a few existing mmap users.  The pcm
mmap case is one of the more straightforward ones.

Acked-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2013-04-19 10:01:04 -07:00
parent fc9bbca8f6
commit 0fe09a45c4
1 changed files with 2 additions and 10 deletions
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12
sound/core/pcm_native.c
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@ -3222,18 +3222,10 @@ EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
struct vm_area_struct *area)
{
long size;
unsigned long offset;
struct snd_pcm_runtime *runtime = substream->runtime;;
area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
area->vm_flags |= VM_IO;
size = area->vm_end - area->vm_start;
offset = area->vm_pgoff << PAGE_SHIFT;
if (io_remap_pfn_range(area, area->vm_start,
(substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
size, area->vm_page_prot))
return -EAGAIN;
return 0;
return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
}
EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);