ASoC: SOF: Propagate sof_get_ctrl_copy_params() error properly

This fixes a compile warning below by properly handling the error code
from sof_get_ctrl_copy_params():
  include/linux/kernel.h:843:43: warning: 'sparams.pl_size' may be used uninitialized in this function [-Wmaybe-uninitialized]
  sound/soc/sof/ipc.c:639:34: note: 'sparams.pl_size' was declared here

The function returns an error before setting sparams.pl_size, so it'd
assign an uninitialized value at a later point.

Fixes: 53e0c72d ("ASoC: SOF: Add support for IPC IO between DSP and Host")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/ipc.c

@@ -567,7 +567,7 @@ static int sof_set_get_large_ctrl_data(struct snd_sof_dev *sdev,
 	size_t offset = 0;
 	size_t msg_bytes;
 	size_t pl_size;
-	int err = 0;
+	int err;
 	int i;
 
 	/* allocate max ipc size because we have at least one */
@@ -576,9 +576,13 @@ static int sof_set_get_large_ctrl_data(struct snd_sof_dev *sdev,
 		return -ENOMEM;
 
 	if (send)
-		sof_get_ctrl_copy_params(cdata->type, cdata, partdata, sparams);
+		err = sof_get_ctrl_copy_params(cdata->type, cdata, partdata,
+					       sparams);
 	else
-		sof_get_ctrl_copy_params(cdata->type, partdata, cdata, sparams);
+		err = sof_get_ctrl_copy_params(cdata->type, partdata, cdata,
+					       sparams);
+	if (err < 0)
+		return err;
 
 	msg_bytes = sparams->msg_bytes;
 	pl_size = sparams->pl_size;