diff options
| author | Takashi Iwai <tiwai@suse.de> | 2023-08-15 21:01:18 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-08-18 12:18:19 +0200 |
| commit | 07ee02a2e12e1b97bdd04fa3e42a67380a60054e (patch) | |
| tree | 72408a2cc917ba358a4a1a0765302178c94b0084 /sound | |
| parent | 9d0fdc602de9d4368ce58da158725d2c43765fd1 (diff) | |
ALSA: es1938: Convert to generic PCM copy ops
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.
Link: https://lore.kernel.org/r/20230815190136.8987-8-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/es1938.c | 30 |
1 files 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) |