This patch converts the GUS driver code to use the new unified PCM
copy callback. It's a straightforward conversion from *_user() to
*_iter() variants.
Note that copy_from/to_iter() returns the copied bytes, hence the
error condition is inverted from copy_from/to_user().
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
sound/isa/gus/gus_pcm.c | 23 +++--------------------
1 file changed, 3 insertions(+), 20 deletions(-)
diff --git a/sound/isa/gus/gus_pcm.c b/sound/isa/gus/gus_pcm.c
index 388db5fb65bd..f67b53612d5f 100644
--- a/sound/isa/gus/gus_pcm.c
+++ b/sound/isa/gus/gus_pcm.c
@@ -369,7 +369,7 @@ static int playback_copy_ack(struct snd_pcm_substream *substream,
static int snd_gf1_pcm_playback_copy(struct snd_pcm_substream *substream,
int voice, unsigned long pos,
- void __user *src, unsigned long count)
+ struct iov_iter *src, unsigned long count)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct gus_pcm_private *pcmp = runtime->private_data;
@@ -379,27 +379,11 @@ static int snd_gf1_pcm_playback_copy(struct snd_pcm_substream *substream,
bpos = get_bpos(pcmp, voice, pos, len);
if (bpos < 0)
return pos;
- if (copy_from_user(runtime->dma_area + bpos, src, len))
+ if (!copy_from_iter(runtime->dma_area + bpos, len, src))
return -EFAULT;
return playback_copy_ack(substream, bpos, len);
}
-static int snd_gf1_pcm_playback_copy_kernel(struct snd_pcm_substream *substream,
- int voice, unsigned long pos,
- void *src, unsigned long count)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct gus_pcm_private *pcmp = runtime->private_data;
- unsigned int len = count;
- int bpos;
-
- bpos = get_bpos(pcmp, voice, pos, len);
- if (bpos < 0)
- return pos;
- memcpy(runtime->dma_area + bpos, src, len);
- return playback_copy_ack(substream, bpos, len);
-}
-
static int snd_gf1_pcm_playback_silence(struct snd_pcm_substream *substream,
int voice, unsigned long pos,
unsigned long count)
@@ -830,8 +814,7 @@ static const struct snd_pcm_ops snd_gf1_pcm_playback_ops = {
.prepare = snd_gf1_pcm_playback_prepare,
.trigger = snd_gf1_pcm_playback_trigger,
.pointer = snd_gf1_pcm_playback_pointer,
- .copy_user = snd_gf1_pcm_playback_copy,
- .copy_kernel = snd_gf1_pcm_playback_copy_kernel,
+ .copy = snd_gf1_pcm_playback_copy,
.fill_silence = snd_gf1_pcm_playback_silence,
};
--
2.35.3
