ALSA: seq: fix passing wrong pointer in function call of compatibility layer

This commit is a fix for Linux 4.9-rc1.

In former commit, a function call of compatibility layer for ALSA sequencer
core was obsoleted by an alternative. Although, the alternative gets a
pointer to kernel stack due to mis-programming. As a result, ALSA sequencer
core unexpectedly refers over kernel stack.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 8ce8eb601c71 ("ALSA: seq: add an alternative way to handle ioctl requests")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/seq/seq_compat.c

@@ -58,7 +58,7 @@ static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned
 		goto error;
 	data->kernel = NULL;
 
-	err = snd_seq_kernel_client_ctl(client->number, cmd, &data);
+	err = snd_seq_kernel_client_ctl(client->number, cmd, data);
 	if (err < 0)
 		goto error;