ALSA: sound/core: use memdup_user()

Remove open-coded memdup_user().

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 4 insertions, 5 deletions

diff --git a/sound/core/seq/seq_compat.c b/sound/core/seq/seq_compat.c
index 38693f47c262..c956fe462569 100644
--- a/sound/core/seq/seq_compat.c
+++ b/sound/core/seq/seq_compat.c
@@ -48,12 +48,11 @@ static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned
         struct snd_seq_port_info *data;
         mm_segment_t fs;
 
-        data = kmalloc(sizeof(*data), GFP_KERNEL);
-        if (! data)
-                return -ENOMEM;
+        data = memdup_user(data32, sizeof(*data32));
+        if (IS_ERR(data))
+                return PTR_ERR(data);
 
-        if (copy_from_user(data, data32, sizeof(*data32)) ||
-            get_user(data->flags, &data32->flags) ||
+        if (get_user(data->flags, &data32->flags) ||
             get_user(data->time_queue, &data32->time_queue))
                 goto error;
         data->kernel = NULL;