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@xxxxxxx>
---
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,
};
--
2.26.2
