[PATCH -next] ASoC: SOF: ipc4-topology: Fix an unsigned comparison which can never be negative

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The return value from the call to sof_ipc4_get_valid_bits() is int.
However, the return value is being assigned to an unsigned
int variable 'out_ref_valid_bits', so making it an int.

Eliminate the following warning:
./sound/soc/sof/ipc4-topology.c:1537:6-24: WARNING: Unsigned expression compared with zero: out_ref_valid_bits < 0

Reported-by: Abaci Robot <abaci@xxxxxxxxxxxxxxxxx>
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4985
Signed-off-by: Yang Li <yang.lee@xxxxxxxxxxxxxxxxx>
---
 sound/soc/sof/ipc4-topology.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/sof/ipc4-topology.c b/sound/soc/sof/ipc4-topology.c
index dce2f8f7f518..d82ac5701eb2 100644
--- a/sound/soc/sof/ipc4-topology.c
+++ b/sound/soc/sof/ipc4-topology.c
@@ -1381,8 +1381,8 @@ sof_ipc4_prepare_copier_module(struct snd_sof_widget *swidget,
 	void **ipc_config_data;
 	int *ipc_config_size;
 	u32 **data;
-	int ipc_size, ret;
-	u32 out_ref_rate, out_ref_channels, out_ref_valid_bits;
+	int ipc_size, ret, out_ref_valid_bits;
+	u32 out_ref_rate, out_ref_channels;
 	u32 deep_buffer_dma_ms = 0;
 	int output_fmt_index;
 
-- 
2.20.1.7.g153144c




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