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Message-Id: <20230815190136.8987-13-tiwai@suse.de>
Date: Tue, 15 Aug 2023 21:01:23 +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 v2 12/25] ALSA: hdsp: Convert to generic PCM copy ops
This patch converts the hdsp 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 adjusted accordingly.
Signed-off-by: Takashi Iwai <tiwai@...e.de>
---
sound/pci/rme9652/hdsp.c | 42 ++++++----------------------------------
1 file changed, 6 insertions(+), 36 deletions(-)
diff --git a/sound/pci/rme9652/hdsp.c b/sound/pci/rme9652/hdsp.c
index 65add92c88aa..e7d1b43471a2 100644
--- a/sound/pci/rme9652/hdsp.c
+++ b/sound/pci/rme9652/hdsp.c
@@ -3961,7 +3961,7 @@ static signed char *hdsp_channel_buffer_location(struct hdsp *hdsp,
static int snd_hdsp_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 hdsp *hdsp = snd_pcm_substream_chip(substream);
signed char *channel_buf;
@@ -3972,28 +3972,14 @@ static int snd_hdsp_playback_copy(struct snd_pcm_substream *substream,
channel_buf = hdsp_channel_buffer_location (hdsp, substream->pstr->stream, 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) != count)
return -EFAULT;
return 0;
}
-static int snd_hdsp_playback_copy_kernel(struct snd_pcm_substream *substream,
- int channel, unsigned long pos,
- void *src, unsigned long count)
-{
- struct hdsp *hdsp = snd_pcm_substream_chip(substream);
- signed char *channel_buf;
-
- channel_buf = hdsp_channel_buffer_location(hdsp, substream->pstr->stream, channel);
- if (snd_BUG_ON(!channel_buf))
- return -EIO;
- memcpy(channel_buf + pos, src, count);
- return 0;
-}
-
static int snd_hdsp_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 hdsp *hdsp = snd_pcm_substream_chip(substream);
signed char *channel_buf;
@@ -4004,25 +3990,11 @@ static int snd_hdsp_capture_copy(struct snd_pcm_substream *substream,
channel_buf = hdsp_channel_buffer_location (hdsp, substream->pstr->stream, 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) != count)
return -EFAULT;
return 0;
}
-static int snd_hdsp_capture_copy_kernel(struct snd_pcm_substream *substream,
- int channel, unsigned long pos,
- void *dst, unsigned long count)
-{
- struct hdsp *hdsp = snd_pcm_substream_chip(substream);
- signed char *channel_buf;
-
- channel_buf = hdsp_channel_buffer_location(hdsp, substream->pstr->stream, channel);
- if (snd_BUG_ON(!channel_buf))
- return -EIO;
- memcpy(dst, channel_buf + pos, count);
- return 0;
-}
-
static int snd_hdsp_hw_silence(struct snd_pcm_substream *substream,
int channel, unsigned long pos,
unsigned long count)
@@ -4950,8 +4922,7 @@ static const struct snd_pcm_ops snd_hdsp_playback_ops = {
.prepare = snd_hdsp_prepare,
.trigger = snd_hdsp_trigger,
.pointer = snd_hdsp_hw_pointer,
- .copy_user = snd_hdsp_playback_copy,
- .copy_kernel = snd_hdsp_playback_copy_kernel,
+ .copy = snd_hdsp_playback_copy,
.fill_silence = snd_hdsp_hw_silence,
};
@@ -4963,8 +4934,7 @@ static const struct snd_pcm_ops snd_hdsp_capture_ops = {
.prepare = snd_hdsp_prepare,
.trigger = snd_hdsp_trigger,
.pointer = snd_hdsp_hw_pointer,
- .copy_user = snd_hdsp_capture_copy,
- .copy_kernel = snd_hdsp_capture_copy_kernel,
+ .copy = snd_hdsp_capture_copy,
};
static int snd_hdsp_create_hwdep(struct snd_card *card, struct hdsp *hdsp)
--
2.35.3
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