The old ISA MSND driver basically maps the iomem as the DMA buffer. For this type of buffer, we have already the standard mmap helper, snd_pcm_lib_mmap_iomem(). Set the DMA address and use the standard helper for allowing the mmap on all architectures properly.
Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/isa/msnd/msnd.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/sound/isa/msnd/msnd.c b/sound/isa/msnd/msnd.c index 4fbc22a5bc5a..e23eaf449c50 100644 --- a/sound/isa/msnd/msnd.c +++ b/sound/isa/msnd/msnd.c @@ -473,6 +473,7 @@ static int snd_msnd_playback_open(struct snd_pcm_substream *substream) snd_msnd_enable_irq(chip);
runtime->dma_area = (__force void *)chip->mappedbase; + runtime->dma_addr = chip->base; runtime->dma_bytes = 0x3000;
chip->playback_substream = substream; @@ -566,6 +567,7 @@ static const struct snd_pcm_ops snd_msnd_playback_ops = { .prepare = snd_msnd_playback_prepare, .trigger = snd_msnd_playback_trigger, .pointer = snd_msnd_playback_pointer, + .mmap = snd_pcm_lib_mmap_iomem, };
static int snd_msnd_capture_open(struct snd_pcm_substream *substream) @@ -576,6 +578,7 @@ static int snd_msnd_capture_open(struct snd_pcm_substream *substream) set_bit(F_AUDIO_READ_INUSE, &chip->flags); snd_msnd_enable_irq(chip); runtime->dma_area = (__force void *)chip->mappedbase + 0x3000; + runtime->dma_addr = chip->base + 0x3000; runtime->dma_bytes = 0x3000; memset(runtime->dma_area, 0, runtime->dma_bytes); chip->capture_substream = substream; @@ -662,6 +665,7 @@ static const struct snd_pcm_ops snd_msnd_capture_ops = { .prepare = snd_msnd_capture_prepare, .trigger = snd_msnd_capture_trigger, .pointer = snd_msnd_capture_pointer, + .mmap = snd_pcm_lib_mmap_iomem, };