[PATCH 07/24] ALSA: korg1212: Convert to generic PCM copy ops

[Takashi Iwai <tiwai@xxxxxxx>]

This patch converts the korg1212 driver code to use the new unified
PCM copy callback.  The open-coded conditional memory copies are
replaced with simpler copy_from/to_sockptr_offset() calls.

Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
 sound/pci/korg1212/korg1212.c | 46 ++++++++---------------------------
 1 file changed, 10 insertions(+), 36 deletions(-)

diff --git a/sound/pci/korg1212/korg1212.c b/sound/pci/korg1212/korg1212.c
index 33b4f95d65b3..644f8b392c54 100644
--- a/sound/pci/korg1212/korg1212.c
+++ b/sound/pci/korg1212/korg1212.c
@@ -1285,8 +1285,7 @@ static int snd_korg1212_silence(struct snd_korg1212 *korg1212, int pos, int coun
 }
 
 static int snd_korg1212_copy_to(struct snd_pcm_substream *substream,
-				void __user *dst, int pos, int count,
-				bool in_kernel)
+				sockptr_t dst, int pos, int count)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
         struct snd_korg1212 *korg1212 = snd_pcm_substream_chip(substream);
@@ -1310,20 +1309,16 @@ static int snd_korg1212_copy_to(struct snd_pcm_substream *substream,
 			return -EFAULT;
 		}
 #endif
-		if (in_kernel)
-			memcpy((__force void *)dst, src, size);
-		else if (copy_to_user(dst, src, size))
+		if (copy_to_sockptr_offset(dst, i * size, src, size))
 			return -EFAULT;
 		src++;
-		dst += size;
 	}
 
 	return 0;
 }
 
 static int snd_korg1212_copy_from(struct snd_pcm_substream *substream,
-				  void __user *src, int pos, int count,
-				  bool in_kernel)
+				  sockptr_t src, int pos, int count)
 {
         struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_korg1212 *korg1212 = snd_pcm_substream_chip(substream);
@@ -1349,12 +1344,9 @@ static int snd_korg1212_copy_from(struct snd_pcm_substream *substream,
 			return -EFAULT;
 		}
 #endif
-		if (in_kernel)
-			memcpy(dst, (__force void *)src, size);
-		else if (copy_from_user(dst, src, size))
+		if (copy_from_sockptr_offset(dst, src, i * size, size))
 			return -EFAULT;
 		dst++;
-		src += size;
 	}
 
 	return 0;
@@ -1642,17 +1634,9 @@ static snd_pcm_uframes_t snd_korg1212_capture_pointer(struct snd_pcm_substream *
 
 static int snd_korg1212_playback_copy(struct snd_pcm_substream *substream,
 				      int channel, unsigned long pos,
-				      void __user *src, unsigned long count)
+				      sockptr_t src, unsigned long count)
 {
-	return snd_korg1212_copy_from(substream, src, pos, count, false);
-}
-
-static int snd_korg1212_playback_copy_kernel(struct snd_pcm_substream *substream,
-				      int channel, unsigned long pos,
-				      void *src, unsigned long count)
-{
-	return snd_korg1212_copy_from(substream, (void __user *)src,
-				      pos, count, true);
+	return snd_korg1212_copy_from(substream, src, pos, count);
 }
 
 static int snd_korg1212_playback_silence(struct snd_pcm_substream *substream,
@@ -1670,17 +1654,9 @@ static int snd_korg1212_playback_silence(struct snd_pcm_substream *substream,
 
 static int snd_korg1212_capture_copy(struct snd_pcm_substream *substream,
 				     int channel, unsigned long pos,
-				     void __user *dst, unsigned long count)
+				     sockptr_t dst, unsigned long count)
 {
-	return snd_korg1212_copy_to(substream, dst, pos, count, false);
-}
-
-static int snd_korg1212_capture_copy_kernel(struct snd_pcm_substream *substream,
-				     int channel, unsigned long pos,
-				     void *dst, unsigned long count)
-{
-	return snd_korg1212_copy_to(substream, (void __user *)dst,
-				    pos, count, true);
+	return snd_korg1212_copy_to(substream, dst, pos, count);
 }
 
 static const struct snd_pcm_ops snd_korg1212_playback_ops = {
@@ -1691,8 +1667,7 @@ static const struct snd_pcm_ops snd_korg1212_playback_ops = {
         .prepare =	snd_korg1212_prepare,
         .trigger =	snd_korg1212_trigger,
         .pointer =	snd_korg1212_playback_pointer,
-	.copy_user =	snd_korg1212_playback_copy,
-	.copy_kernel =	snd_korg1212_playback_copy_kernel,
+	.copy =		snd_korg1212_playback_copy,
 	.fill_silence =	snd_korg1212_playback_silence,
 };
 
@@ -1704,8 +1679,7 @@ static const struct snd_pcm_ops snd_korg1212_capture_ops = {
 	.prepare =	snd_korg1212_prepare,
 	.trigger =	snd_korg1212_trigger,
 	.pointer =	snd_korg1212_capture_pointer,
-	.copy_user =	snd_korg1212_capture_copy,
-	.copy_kernel =	snd_korg1212_capture_copy_kernel,
+	.copy =		snd_korg1212_capture_copy,
 };
 
 /*
-- 
2.35.3