1 files changed, 18 insertions, 59 deletions

diff --git a/sound/xen/xen_snd_front_alsa.c b/sound/xen/xen_snd_front_alsa.c
index a7f413cb704d..b229eb6f7057 100644
--- a/sound/xen/xen_snd_front_alsa.c
+++ b/sound/xen/xen_snd_front_alsa.c
@@ -69,11 +69,6 @@ struct alsa_sndif_sample_format {
 	snd_pcm_format_t alsa;
 };
 
-struct alsa_sndif_hw_param {
-	u8 sndif;
-	snd_pcm_hw_param_t alsa;
-};
-
 static const struct alsa_sndif_sample_format ALSA_SNDIF_FORMATS[] = {
 	{
 		.sndif = XENSND_PCM_FORMAT_U8,
@@ -196,7 +191,7 @@ static u64 to_sndif_formats_mask(u64 alsa_formats)
 	mask = 0;
 	for (i = 0; i < ARRAY_SIZE(ALSA_SNDIF_FORMATS); i++)
 		if (pcm_format_to_bits(ALSA_SNDIF_FORMATS[i].alsa) & alsa_formats)
-			mask |= 1 << ALSA_SNDIF_FORMATS[i].sndif;
+			mask |= BIT_ULL(ALSA_SNDIF_FORMATS[i].sndif);
 
 	return mask;
 }
@@ -208,7 +203,7 @@ static u64 to_alsa_formats_mask(u64 sndif_formats)
 
 	mask = 0;
 	for (i = 0; i < ARRAY_SIZE(ALSA_SNDIF_FORMATS); i++)
-		if (1 << ALSA_SNDIF_FORMATS[i].sndif & sndif_formats)
+		if (BIT_ULL(ALSA_SNDIF_FORMATS[i].sndif) & sndif_formats)
 			mask |= pcm_format_to_bits(ALSA_SNDIF_FORMATS[i].alsa);
 
 	return mask;
@@ -441,7 +436,7 @@ static int shbuf_setup_backstore(struct xen_snd_front_pcm_stream_info *stream,
 {
 	int i;
 
-	stream->buffer = alloc_pages_exact(stream->buffer_sz, GFP_KERNEL);
+	stream->buffer = alloc_pages_exact(buffer_sz, GFP_KERNEL);
 	if (!stream->buffer)
 		return -ENOMEM;
 
@@ -602,38 +597,24 @@ static snd_pcm_uframes_t alsa_pointer(struct snd_pcm_substream *substream)
 	return (snd_pcm_uframes_t)atomic_read(&stream->hw_ptr);
 }
 
-static int alsa_pb_copy_user(struct snd_pcm_substream *substream,
-			     int channel, unsigned long pos, void __user *src,
-			     unsigned long count)
+static int alsa_pb_copy(struct snd_pcm_substream *substream,
+			int channel, unsigned long pos, struct iov_iter *src,
+			unsigned long count)
 {
 	struct xen_snd_front_pcm_stream_info *stream = stream_get(substream);
 
 	if (unlikely(pos + count > stream->buffer_sz))
 		return -EINVAL;
 
-	if (copy_from_user(stream->buffer + pos, src, count))
+	if (copy_from_iter(stream->buffer + pos, count, src) != count)
 		return -EFAULT;
 
 	return xen_snd_front_stream_write(&stream->evt_pair->req, pos, count);
 }
 
-static int alsa_pb_copy_kernel(struct snd_pcm_substream *substream,
-			       int channel, unsigned long pos, void *src,
-			       unsigned long count)
-{
-	struct xen_snd_front_pcm_stream_info *stream = stream_get(substream);
-
-	if (unlikely(pos + count > stream->buffer_sz))
-		return -EINVAL;
-
-	memcpy(stream->buffer + pos, src, count);
-
-	return xen_snd_front_stream_write(&stream->evt_pair->req, pos, count);
-}
-
-static int alsa_cap_copy_user(struct snd_pcm_substream *substream,
-			      int channel, unsigned long pos, void __user *dst,
-			      unsigned long count)
+static int alsa_cap_copy(struct snd_pcm_substream *substream,
+			 int channel, unsigned long pos, struct iov_iter *dst,
+			 unsigned long count)
 {
 	struct xen_snd_front_pcm_stream_info *stream = stream_get(substream);
 	int ret;
@@ -645,26 +626,8 @@ static int alsa_cap_copy_user(struct snd_pcm_substream *substream,
 	if (ret < 0)
 		return ret;
 
-	return copy_to_user(dst, stream->buffer + pos, count) ?
-		-EFAULT : 0;
-}
-
-static int alsa_cap_copy_kernel(struct snd_pcm_substream *substream,
-				int channel, unsigned long pos, void *dst,
-				unsigned long count)
-{
-	struct xen_snd_front_pcm_stream_info *stream = stream_get(substream);
-	int ret;
-
-	if (unlikely(pos + count > stream->buffer_sz))
-		return -EINVAL;
-
-	ret = xen_snd_front_stream_read(&stream->evt_pair->req, pos, count);
-	if (ret < 0)
-		return ret;
-
-	memcpy(dst, stream->buffer + pos, count);
-
+	if (copy_to_iter(stream->buffer + pos, count, dst) != count)
+		return -EFAULT;
 	return 0;
 }
 
@@ -692,28 +655,24 @@ static int alsa_pb_fill_silence(struct snd_pcm_substream *substream,
 static const struct snd_pcm_ops snd_drv_alsa_playback_ops = {
 	.open		= alsa_open,
 	.close		= alsa_close,
-	.ioctl		= snd_pcm_lib_ioctl,
 	.hw_params	= alsa_hw_params,
 	.hw_free	= alsa_hw_free,
 	.prepare	= alsa_prepare,
 	.trigger	= alsa_trigger,
 	.pointer	= alsa_pointer,
-	.copy_user	= alsa_pb_copy_user,
-	.copy_kernel	= alsa_pb_copy_kernel,
+	.copy		= alsa_pb_copy,
 	.fill_silence	= alsa_pb_fill_silence,
 };
 
 static const struct snd_pcm_ops snd_drv_alsa_capture_ops = {
 	.open		= alsa_open,
 	.close		= alsa_close,
-	.ioctl		= snd_pcm_lib_ioctl,
 	.hw_params	= alsa_hw_params,
 	.hw_free	= alsa_hw_free,
 	.prepare	= alsa_prepare,
 	.trigger	= alsa_trigger,
 	.pointer	= alsa_pointer,
-	.copy_user	= alsa_cap_copy_user,
-	.copy_kernel	= alsa_cap_copy_kernel,
+	.copy		= alsa_cap_copy,
 };
 
 static int new_pcm_instance(struct xen_snd_front_card_info *card_info,
@@ -785,7 +744,7 @@ static int new_pcm_instance(struct xen_snd_front_card_info *card_info,
 	pcm->info_flags = 0;
 	/* we want to handle all PCM operations in non-atomic context */
 	pcm->nonatomic = true;
-	strncpy(pcm->name, "Virtual card PCM", sizeof(pcm->name));
+	strscpy(pcm->name, "Virtual card PCM", sizeof(pcm->name));
 
 	if (instance_cfg->num_streams_pb)
 		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
@@ -837,9 +796,9 @@ int xen_snd_front_alsa_init(struct xen_snd_front_info *front_info)
 			goto fail;
 	}
 
-	strncpy(card->driver, XENSND_DRIVER_NAME, sizeof(card->driver));
-	strncpy(card->shortname, cfg->name_short, sizeof(card->shortname));
-	strncpy(card->longname, cfg->name_long, sizeof(card->longname));
+	strscpy(card->driver, XENSND_DRIVER_NAME, sizeof(card->driver));
+	strscpy(card->shortname, cfg->name_short, sizeof(card->shortname));
+	strscpy(card->longname, cfg->name_long, sizeof(card->longname));
 
 	ret = snd_card_register(card);
 	if (ret < 0)