hwmon: (ina3221) Fix read timeout issue

After introducing "samples" to the calculation of wait time, the
driver might timeout at the regmap_field_read_poll_timeout call,
because the wait time could be longer than the 100000 usec limit
due to a large "samples" number.

So this patch sets the timeout limit to 2 times of the wait time
in order to fix this issue.

Fixes: 5c090abf945b ("hwmon: (ina3221) Add averaging mode support")
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Link: https://lore.kernel.org/r/20191022005922.30239-1-nicoleotsuka@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/ina3221.c b/drivers/hwmon/ina3221.c
index 0037e2b..8a51dcf 100644 (file)
--- a/drivers/hwmon/ina3221.c
+++ b/drivers/hwmon/ina3221.c
@@ -170,7 +170,7 @@ static inline int ina3221_wait_for_data(struct ina3221_data *ina)
 
        /* Polling the CVRF bit to make sure read data is ready */
        return regmap_field_read_poll_timeout(ina->fields[F_CVRF],
-                                             cvrf, cvrf, wait, 100000);
+                                             cvrf, cvrf, wait, wait * 2);
 }
 
 static int ina3221_read_value(struct ina3221_data *ina, unsigned int reg,