ds2760_battery: Fix calculation of time_to_empty_now

commit 86af95039b69a90db15294eb1f9c147f1df0a8ea upstream.

A check against division by zero was modified in commit b0525b48.
Since this change time_to_empty_now is always reported as zero
while the battery is discharging and as a negative value while
the battery is charging. This is because current is negative while
the battery is discharging.

Fix the check introduced by commit b0525b48 so that time_to_empty_now
is reported correctly during discharge and as zero while charging.

Signed-off-by: Sven Neumann <s.neumann@raumfeld.com>
Acked-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/power/ds2760_battery.c b/drivers/power/ds2760_battery.c
index 4d3b27228a2e0ea6bd844f9ae9fbb4161059a3eb..c8d26df9f1457cb4ddb12796446bc82bf4945b59 100644 (file)
--- a/drivers/power/ds2760_battery.c
+++ b/drivers/power/ds2760_battery.c
@@ -212,7 +212,7 @@ static int ds2760_battery_read_status(struct ds2760_device_info *di)
        if (di->rem_capacity > 100)
                di->rem_capacity = 100;
 
-       if (di->current_uA >= 100L)
+       if (di->current_uA < -100L)
                di->life_sec = -((di->accum_current_uAh - di->empty_uAh) * 36L)
                                        / (di->current_uA / 100L);
        else