linux-kernel - [PATCH 11/25] ALSA: rme96: Convert to generic PCM copy ops

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Date:   Mon, 14 Aug 2023 13:55:09 +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 11/25] ALSA: rme96: Convert to generic PCM copy ops

This patch converts the rme96 driver code to use the new unified PCM
copy callback.  It's a straightforward conversion from *_user() to
*_iter() variants.

Signed-off-by: Takashi Iwai <tiwai@...e.de>
---
 sound/pci/rme96.c | 42 ++++++++----------------------------------
 1 file changed, 8 insertions(+), 34 deletions(-)

diff --git a/sound/pci/rme96.c b/sound/pci/rme96.c
index bccb7e0d3d11..6b5ffb18197b 100644
--- a/sound/pci/rme96.c
+++ b/sound/pci/rme96.c
@@ -320,48 +320,26 @@ snd_rme96_playback_silence(struct snd_pcm_substream *substream,
 static int
 snd_rme96_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 rme96 *rme96 = snd_pcm_substream_chip(substream);
 
-	return copy_from_user_toio(rme96->iobase + RME96_IO_PLAY_BUFFER + pos,
+	return copy_from_iter_toio(rme96->iobase + RME96_IO_PLAY_BUFFER + pos,
 				   src, count);
 }
 
-static int
-snd_rme96_playback_copy_kernel(struct snd_pcm_substream *substream,
-			       int channel, unsigned long pos,
-			       void *src, unsigned long count)
-{
-	struct rme96 *rme96 = snd_pcm_substream_chip(substream);
-
-	memcpy_toio(rme96->iobase + RME96_IO_PLAY_BUFFER + pos, src, count);
-	return 0;
-}
-
 static int
 snd_rme96_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 rme96 *rme96 = snd_pcm_substream_chip(substream);
 
-	return copy_to_user_fromio(dst,
+	return copy_to_iter_fromio(dst,
 				   rme96->iobase + RME96_IO_REC_BUFFER + pos,
 				   count);
 }
 
-static int
-snd_rme96_capture_copy_kernel(struct snd_pcm_substream *substream,
-			      int channel, unsigned long pos,
-			      void *dst, unsigned long count)
-{
-	struct rme96 *rme96 = snd_pcm_substream_chip(substream);
-
-	memcpy_fromio(dst, rme96->iobase + RME96_IO_REC_BUFFER + pos, count);
-	return 0;
-}
-
 /*
  * Digital output capabilities (S/PDIF)
  */
@@ -1518,8 +1496,7 @@ static const struct snd_pcm_ops snd_rme96_playback_spdif_ops = {
 	.prepare =	snd_rme96_playback_prepare,
 	.trigger =	snd_rme96_playback_trigger,
 	.pointer =	snd_rme96_playback_pointer,
-	.copy_user =	snd_rme96_playback_copy,
-	.copy_kernel =	snd_rme96_playback_copy_kernel,
+	.copy =		snd_rme96_playback_copy,
 	.fill_silence =	snd_rme96_playback_silence,
 	.mmap =		snd_pcm_lib_mmap_iomem,
 };
@@ -1531,8 +1508,7 @@ static const struct snd_pcm_ops snd_rme96_capture_spdif_ops = {
 	.prepare =	snd_rme96_capture_prepare,
 	.trigger =	snd_rme96_capture_trigger,
 	.pointer =	snd_rme96_capture_pointer,
-	.copy_user =	snd_rme96_capture_copy,
-	.copy_kernel =	snd_rme96_capture_copy_kernel,
+	.copy =		snd_rme96_capture_copy,
 	.mmap =		snd_pcm_lib_mmap_iomem,
 };
 
@@ -1543,8 +1519,7 @@ static const struct snd_pcm_ops snd_rme96_playback_adat_ops = {
 	.prepare =	snd_rme96_playback_prepare,
 	.trigger =	snd_rme96_playback_trigger,
 	.pointer =	snd_rme96_playback_pointer,
-	.copy_user =	snd_rme96_playback_copy,
-	.copy_kernel =	snd_rme96_playback_copy_kernel,
+	.copy =		snd_rme96_playback_copy,
 	.fill_silence =	snd_rme96_playback_silence,
 	.mmap =		snd_pcm_lib_mmap_iomem,
 };
@@ -1556,8 +1531,7 @@ static const struct snd_pcm_ops snd_rme96_capture_adat_ops = {
 	.prepare =	snd_rme96_capture_prepare,
 	.trigger =	snd_rme96_capture_trigger,
 	.pointer =	snd_rme96_capture_pointer,
-	.copy_user =	snd_rme96_capture_copy,
-	.copy_kernel =	snd_rme96_capture_copy_kernel,
+	.copy =		snd_rme96_capture_copy,
 	.mmap =		snd_pcm_lib_mmap_iomem,
 };
 
-- 
2.35.3