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>
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index f067c5b..c906be2 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -3062,6 +3062,13 @@
}
#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 @@
struct snd_pcm_runtime *runtime;
unsigned long offset;
struct page * page;
- void *vaddr;
size_t dma_bytes;
if (substream == NULL)
@@ -3082,14 +3088,12 @@
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;