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Date: Mon, 14 Aug 2023 13:55:11 +0200
From: Takashi Iwai <tiwai@...e.de>
To: alsa-devel@...a-project.org
Cc: linux-kernel@...r.kernel.org, Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 13/25] ALSA: rme9652: Convert to generic PCM copy ops
This patch converts the rme9652 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@...e.de>
---
sound/pci/rme9652/rme9652.c | 46 +++++--------------------------------
1 file changed, 6 insertions(+), 40 deletions(-)
diff --git a/sound/pci/rme9652/rme9652.c b/sound/pci/rme9652/rme9652.c
index e7c320afefe8..fb01d9c4247b 100644
--- a/sound/pci/rme9652/rme9652.c
+++ b/sound/pci/rme9652/rme9652.c
@@ -1844,7 +1844,7 @@ static signed char *rme9652_channel_buffer_location(struct snd_rme9652 *rme9652,
static int snd_rme9652_playback_copy(struct snd_pcm_substream *substream,
int channel, unsigned long pos,
- void __user *src, unsigned long count)
+ struct iov_iter *src, unsigned long count)
{
struct snd_rme9652 *rme9652 = snd_pcm_substream_chip(substream);
signed char *channel_buf;
@@ -1857,30 +1857,14 @@ static int snd_rme9652_playback_copy(struct snd_pcm_substream *substream,
channel);
if (snd_BUG_ON(!channel_buf))
return -EIO;
- if (copy_from_user(channel_buf + pos, src, count))
+ if (!copy_from_iter(channel_buf + pos, count, src))
return -EFAULT;
return 0;
}
-static int snd_rme9652_playback_copy_kernel(struct snd_pcm_substream *substream,
- int channel, unsigned long pos,
- void *src, unsigned long count)
-{
- struct snd_rme9652 *rme9652 = snd_pcm_substream_chip(substream);
- signed char *channel_buf;
-
- channel_buf = rme9652_channel_buffer_location(rme9652,
- substream->pstr->stream,
- channel);
- if (snd_BUG_ON(!channel_buf))
- return -EIO;
- memcpy(channel_buf + pos, src, count);
- return 0;
-}
-
static int snd_rme9652_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_rme9652 *rme9652 = snd_pcm_substream_chip(substream);
signed char *channel_buf;
@@ -1893,27 +1877,11 @@ static int snd_rme9652_capture_copy(struct snd_pcm_substream *substream,
channel);
if (snd_BUG_ON(!channel_buf))
return -EIO;
- if (copy_to_user(dst, channel_buf + pos, count))
+ if (!copy_to_iter(channel_buf + pos, count, dst))
return -EFAULT;
return 0;
}
-static int snd_rme9652_capture_copy_kernel(struct snd_pcm_substream *substream,
- int channel, unsigned long pos,
- void *dst, unsigned long count)
-{
- struct snd_rme9652 *rme9652 = snd_pcm_substream_chip(substream);
- signed char *channel_buf;
-
- channel_buf = rme9652_channel_buffer_location(rme9652,
- substream->pstr->stream,
- channel);
- if (snd_BUG_ON(!channel_buf))
- return -EIO;
- memcpy(dst, channel_buf + pos, count);
- return 0;
-}
-
static int snd_rme9652_hw_silence(struct snd_pcm_substream *substream,
int channel, unsigned long pos,
unsigned long count)
@@ -2370,8 +2338,7 @@ static const struct snd_pcm_ops snd_rme9652_playback_ops = {
.prepare = snd_rme9652_prepare,
.trigger = snd_rme9652_trigger,
.pointer = snd_rme9652_hw_pointer,
- .copy_user = snd_rme9652_playback_copy,
- .copy_kernel = snd_rme9652_playback_copy_kernel,
+ .copy = snd_rme9652_playback_copy,
.fill_silence = snd_rme9652_hw_silence,
};
@@ -2383,8 +2350,7 @@ static const struct snd_pcm_ops snd_rme9652_capture_ops = {
.prepare = snd_rme9652_prepare,
.trigger = snd_rme9652_trigger,
.pointer = snd_rme9652_hw_pointer,
- .copy_user = snd_rme9652_capture_copy,
- .copy_kernel = snd_rme9652_capture_copy_kernel,
+ .copy = snd_rme9652_capture_copy,
};
static int snd_rme9652_create_pcm(struct snd_card *card,
--
2.35.3
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