This patch converts the es1938 driver code to use the new unified PCM
copy callback. It's a straightforward conversion from *_user() to
*_iter() variants in most parts.
Note that copy_from/to_iter() returns the copied bytes, hence the
error condition is adjusted accordingly.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
sound/pci/es1938.c | 30 +++++-------------------------
1 file changed, 5 insertions(+), 25 deletions(-)
diff --git a/sound/pci/es1938.c b/sound/pci/es1938.c
index e34ec6f89e7e..ec598ba1a883 100644
--- a/sound/pci/es1938.c
+++ b/sound/pci/es1938.c
@@ -824,7 +824,7 @@ static snd_pcm_uframes_t snd_es1938_playback_pointer(struct snd_pcm_substream *s
static int snd_es1938_capture_copy(struct snd_pcm_substream *substream,
int channel, unsigned long pos,
- void __user *dst, unsigned long count)
+ struct iov_iter *dst, unsigned long count)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct es1938 *chip = snd_pcm_substream_chip(substream);
@@ -832,36 +832,17 @@ static int snd_es1938_capture_copy(struct snd_pcm_substream *substream,
if (snd_BUG_ON(pos + count > chip->dma1_size))
return -EINVAL;
if (pos + count < chip->dma1_size) {
- if (copy_to_user(dst, runtime->dma_area + pos + 1, count))
+ if (copy_to_iter(runtime->dma_area + pos + 1, count, dst) != count)
return -EFAULT;
} else {
- if (copy_to_user(dst, runtime->dma_area + pos + 1, count - 1))
+ if (copy_to_iter(runtime->dma_area + pos + 1, count - 1, dst) != count - 1)
return -EFAULT;
- if (put_user(runtime->dma_area[0],
- ((unsigned char __user *)dst) + count - 1))
+ if (copy_to_iter(runtime->dma_area, 1, dst) != 1)
return -EFAULT;
}
return 0;
}
-static int snd_es1938_capture_copy_kernel(struct snd_pcm_substream *substream,
- int channel, unsigned long pos,
- void *dst, unsigned long count)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct es1938 *chip = snd_pcm_substream_chip(substream);
-
- if (snd_BUG_ON(pos + count > chip->dma1_size))
- return -EINVAL;
- if (pos + count < chip->dma1_size) {
- memcpy(dst, runtime->dma_area + pos + 1, count);
- } else {
- memcpy(dst, runtime->dma_area + pos + 1, count - 1);
- runtime->dma_area[0] = *((unsigned char *)dst + count - 1);
- }
- return 0;
-}
-
/* ----------------------------------------------------------------------
* Audio1 Capture (ADC)
* ----------------------------------------------------------------------*/
@@ -987,8 +968,7 @@ static const struct snd_pcm_ops snd_es1938_capture_ops = {
.prepare = snd_es1938_capture_prepare,
.trigger = snd_es1938_capture_trigger,
.pointer = snd_es1938_capture_pointer,
- .copy_user = snd_es1938_capture_copy,
- .copy_kernel = snd_es1938_capture_copy_kernel,
+ .copy = snd_es1938_capture_copy,
};
static int snd_es1938_new_pcm(struct es1938 *chip, int device)
--
2.35.3
