Modified: trunk/sound/core/pcm_native.c (7722 => 7723)
--- trunk/sound/core/pcm_native.c 2009-10-28 06:50:36 UTC (rev 7722)
+++ trunk/sound/core/pcm_native.c 2009-10-29 06:39:14 UTC (rev 7723)
@@ -3369,14 +3369,29 @@
#endif /* CONFIG_SND_SUPPORT_OLD_API */
#ifndef CONFIG_MMU
-unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
- unsigned long len, unsigned long pgoff,
- unsigned long flags)
+static unsigned long snd_pcm_get_unmapped_area(struct file *file,
+ unsigned long addr,
+ unsigned long len,
+ unsigned long pgoff,
+ unsigned long flags)
{
- return 0;
-}
+ struct snd_pcm_file *pcm_file = file->private_data;
+ struct snd_pcm_substream *substream = pcm_file->substream;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ unsigned long offset = pgoff << PAGE_SHIFT;
+
+ switch (offset) {
+ case SNDRV_PCM_MMAP_OFFSET_STATUS:
+ return (unsigned long)runtime->status;
+ case SNDRV_PCM_MMAP_OFFSET_CONTROL:
+ return (unsigned long)runtime->control;
+ default:
+ return (unsigned long)runtime->dma_area + offset;
+ }
+ }
+
#else
-# define dummy_get_unmapped_area NULL
+# define snd_pcm_get_unmapped_area NULL
#endif
/*
@@ -3395,7 +3410,7 @@
.compat_ioctl = snd_pcm_ioctl_compat,
.mmap = snd_pcm_mmap,
.fasync = snd_pcm_fasync,
- .get_unmapped_area = dummy_get_unmapped_area,
+ .get_unmapped_area = snd_pcm_get_unmapped_area,
},
{
.owner = THIS_MODULE,
@@ -3408,6 +3423,6 @@
.compat_ioctl = snd_pcm_ioctl_compat,
.mmap = snd_pcm_mmap,
.fasync = snd_pcm_fasync,
- .get_unmapped_area = dummy_get_unmapped_area,
+ .get_unmapped_area = snd_pcm_get_unmapped_area,
}
};
