regulator: mt6359: add read check for PMIC MT6359

commit a511637 upstream.

Add hardware version read check for PMIC MT6359

Signed-off-by: Sen Chu <[email protected]
Fixes: 4cfc965 ("regulator: mt6359: Add support for MT6359P regulator")
Reviewed-by: AngeloGioacchino Del Regno <[email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Sen Chu

drivers/regulator/mt6359-regulator.c

@@ -951,9 +951,12 @@ static int mt6359_regulator_probe(struct platform_device *pdev)
 	struct regulator_config config = {};
 	struct regulator_dev *rdev;
 	struct mt6359_regulator_info *mt6359_info;
-	int i, hw_ver;
+	int i, hw_ver, ret;
+
+	ret = regmap_read(mt6397->regmap, MT6359P_HWCID, &hw_ver);
+	if (ret)
+		return ret;
 
-	regmap_read(mt6397->regmap, MT6359P_HWCID, &hw_ver);
 	if (hw_ver >= MT6359P_CHIP_VER)
 		mt6359_info = mt6359p_regulators;
 	else