[PATCH][next] ASoC: SOF: ipc4-topology: Fix a less than zero check on a u32

[Colin Ian King <colin.i.king@gmail.com>]

Currently the error check from the call to sof_ipc4_get_sample_type
is always false because a u32 variable out_ref_type is being used
to perform the less than zero check. Fix this by using the int
variable ret to perform the check.

Fixes: c04c2e829649 ("ASoC: SOF: ipc4-topology: Add support for 8-bit formats")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
---
 sound/soc/sof/ipc4-topology.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sof/ipc4-topology.c b/sound/soc/sof/ipc4-topology.c
index f5e62cd8fc0c..b6a732d0adb4 100644
--- a/sound/soc/sof/ipc4-topology.c
+++ b/sound/soc/sof/ipc4-topology.c
@@ -2191,9 +2191,10 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 	case snd_soc_dapm_dai_in:
 		out_ref_rate = params_rate(fe_params);
 		out_ref_channels = params_channels(fe_params);
-		out_ref_type = sof_ipc4_get_sample_type(sdev, fe_params);
-		if (out_ref_type < 0)
-			return out_ref_type;
+		ret = sof_ipc4_get_sample_type(sdev, fe_params);
+		if (ret < 0)
+			return ret;
+		out_ref_type = (u32)ret;
 
 		if (!single_output_bitdepth) {
 			out_ref_valid_bits = sof_ipc4_get_valid_bits(sdev, fe_params);
-- 
2.51.0