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: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/sound/compress_driver.h b/include/sound/compress_driver.h
index ff6c74153fa1..db8273a5175a 100644
--- a/include/sound/compress_driver.h
+++ b/include/sound/compress_driver.h
@@ -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);