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authorTakashi Iwai <tiwai@suse.de>2009-11-26 12:43:39 +0100
committerTakashi Iwai <tiwai@suse.de>2009-11-26 15:07:21 +0100
commit9eb4a06788a598573c751af1a7e46639afc89513 (patch)
treed82ea448a63dc6972995a85d4037f8318c76f869 /sound/core/pcm_native.c
parent657b1989dacf58e83e7a76bca6d4a91a9f294cf6 (diff)
downloadlinux-2.6.34-ux500-9eb4a06788a598573c751af1a7e46639afc89513.tar.gz
ALSA: pcm - define snd_pcm_default_page_ops()
Add a helper (inline) function as the default page ops. Any hacks wrt the page address conversion will be applied in this function. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/pcm_native.c')
-rw-r--r--sound/core/pcm_native.c20
1 files changed, 12 insertions, 8 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index f067c5b906e..c906be26c31 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -3062,6 +3062,13 @@ static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file
}
#endif /* coherent mmap */
+static inline struct page *
+snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
+{
+ void *vaddr = substream->runtime->dma_area + ofs;
+ return virt_to_page(vaddr);
+}
+
/*
* fault callback for mmapping a RAM page
*/
@@ -3072,7 +3079,6 @@ static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
struct snd_pcm_runtime *runtime;
unsigned long offset;
struct page * page;
- void *vaddr;
size_t dma_bytes;
if (substream == NULL)
@@ -3082,14 +3088,12 @@ static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
if (offset > dma_bytes - PAGE_SIZE)
return VM_FAULT_SIGBUS;
- if (substream->ops->page) {
+ if (substream->ops->page)
page = substream->ops->page(substream, offset);
- if (!page)
- return VM_FAULT_SIGBUS;
- } else {
- vaddr = runtime->dma_area + offset;
- page = virt_to_page(vaddr);
- }
+ else
+ page = snd_pcm_default_page_ops(substream, offset);
+ if (!page)
+ return VM_FAULT_SIGBUS;
get_page(page);
vmf->page = page;
return 0;