Commit 4daf891c authored by Charles Keepax's avatar Charles Keepax Committed by Takashi Iwai

ALSA: compress_core: Deconstify copy callback buffer

The buffer passed to the copy callback should not be const because the
copy callback can be used for capture and playback.
Signed-off-by: default avatarCharles Keepax <>
Signed-off-by: default avatarRichard Fitzgerald <>
Acked-by: default avatarVinod Koul <>
Signed-off-by: default avatarTakashi Iwai <>
parent 5b1f79f7
......@@ -121,7 +121,7 @@ struct snd_compr_ops {
int (*trigger)(struct snd_compr_stream *stream, int cmd);
int (*pointer)(struct snd_compr_stream *stream,
struct snd_compr_tstamp *tstamp);
int (*copy)(struct snd_compr_stream *stream, const char __user *buf,
int (*copy)(struct snd_compr_stream *stream, char __user *buf,
size_t count);
int (*mmap)(struct snd_compr_stream *stream,
struct vm_area_struct *vma);
......@@ -272,10 +272,12 @@ static ssize_t snd_compr_write(struct file *f, const char __user *buf,
if (avail > count)
avail = count;
if (stream->ops->copy)
retval = stream->ops->copy(stream, buf, avail);
if (stream->ops->copy) {
char __user* cbuf = (char __user*)buf;
retval = stream->ops->copy(stream, cbuf, avail);
} else {
retval = snd_compr_write_data(stream, buf, avail);
if (retval > 0)
stream->runtime->total_bytes_available += retval;
......@@ -315,7 +315,7 @@ static int soc_compr_pointer(struct snd_compr_stream *cstream,
static int soc_compr_copy(struct snd_compr_stream *cstream,
const char __user *buf, size_t count)
char __user *buf, size_t count)
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_soc_platform *platform = rtd->platform;
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