[PATCH 03/12] ASoC: intel: sof_sdw: Check link mask validity in get_dailink_info

[Charles Keepax <ckeepax@opensource.cirrus.com>]

As get_dailink_info spins through all the links anyway simply check the
link masks there. This saves an extra check and means the code will
fail earlier if the mask is invalid.

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
 sound/soc/intel/boards/sof_sdw.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/sound/soc/intel/boards/sof_sdw.c b/sound/soc/intel/boards/sof_sdw.c
index 89614d08d0918..268629d5505c3 100644
--- a/sound/soc/intel/boards/sof_sdw.c
+++ b/sound/soc/intel/boards/sof_sdw.c
@@ -1053,6 +1053,10 @@ static int get_dailink_info(struct device *dev,
 		int stream;
 		u64 adr;
 
+		/* make sure the link mask has a single bit set */
+		if (!is_power_of_2(adr_link->mask))
+			return -EINVAL;
+
 		for (i = 0; i < adr_link->num_adr; i++) {
 			adr = adr_link->adr_d[i].adr;
 			codec_index = find_codec_info_part(adr);
@@ -1302,10 +1306,6 @@ static int get_slave_info(const struct snd_soc_acpi_link_adr *adr_link,
 	no_aggregation = sof_sdw_quirk & SOF_SDW_NO_AGGREGATION;
 	adr_d = &adr_link->adr_d[adr_index];
 
-	/* make sure the link mask has a single bit set */
-	if (!is_power_of_2(adr_link->mask))
-		return -EINVAL;
-
 	cpu_dai_id[index++] = ffs(adr_link->mask) - 1;
 	if (!adr_d->endpoints->aggregated || no_aggregation) {
 		*cpu_dai_num = 1;
@@ -1334,10 +1334,6 @@ static int get_slave_info(const struct snd_soc_acpi_link_adr *adr_link,
 		    endpoint->group_id != *group_id)
 			continue;
 
-		/* make sure the link mask has a single bit set */
-		if (!is_power_of_2(adr_next->mask))
-			return -EINVAL;
-
 		if (index >= SDW_MAX_CPU_DAIS) {
 			dev_err(dev, "cpu_dai_id array overflows\n");
 			return -EINVAL;
-- 
2.30.2