power: supply: max17042_battery: fix model download bug.

The device's model download function returns the model data as
an array of u32s, which is later compared to the reference
model data. However, since the latter is an array of u16s,
the comparison does not happen correctly, and model verification
fails. This in turn breaks the POR initialization sequence.

Fixes: 39e7213edc4f3 ("max17042_battery: Support regmap to access device's registers")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sven Van Asbroeck <TheSven73@googlemail.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

1 files changed, 9 insertions, 6 deletions

diff --git a/drivers/power/max17042_battery.c b/drivers/power/max17042_battery.c
index 9c65f134d447..da7a75f82489 100644
--- a/drivers/power/max17042_battery.c
+++ b/drivers/power/max17042_battery.c
@@ -457,13 +457,16 @@ static inline void max17042_write_model_data(struct max17042_chip *chip,
 }
 
 static inline void max17042_read_model_data(struct max17042_chip *chip,
-                                        u8 addr, u32 *data, int size)
+                                        u8 addr, u16 *data, int size)
 {
         struct regmap *map = chip->regmap;
         int i;
+        u32 tmp;
 
-        for (i = 0; i < size; i++)
-                regmap_read(map, addr + i, &data[i]);
+        for (i = 0; i < size; i++) {
+                regmap_read(map, addr + i, &tmp);
+                data[i] = (u16)tmp;
+        }
 }
 
 static inline int max17042_model_data_compare(struct max17042_chip *chip,
@@ -486,7 +489,7 @@ static int max17042_init_model(struct max17042_chip *chip)
 {
         int ret;
         int table_size = ARRAY_SIZE(chip->pdata->config_data->cell_char_tbl);
-        u32 *temp_data;
+        u16 *temp_data;
 
         temp_data = kcalloc(table_size, sizeof(*temp_data), GFP_KERNEL);
         if (!temp_data)
@@ -501,7 +504,7 @@ static int max17042_init_model(struct max17042_chip *chip)
         ret = max17042_model_data_compare(
                 chip,
                 chip->pdata->config_data->cell_char_tbl,
-                (u16 *)temp_data,
+                temp_data,
                 table_size);
 
         max10742_lock_model(chip);
@@ -514,7 +517,7 @@ static int max17042_verify_model_lock(struct max17042_chip *chip)
 {
         int i;
         int table_size = ARRAY_SIZE(chip->pdata->config_data->cell_char_tbl);
-        u32 *temp_data;
+        u16 *temp_data;
         int ret = 0;
 
         temp_data = kcalloc(table_size, sizeof(*temp_data), GFP_KERNEL);