[patch 102/176] ds2760_battery: Fix calculation of time_to_empty_now

[Greg KH]

2.6.36-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Sven Neumann <s.neumann@xxxxxxxxxxxx>

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@xxxxxxxxxxxx>
Acked-by: Daniel Mack <daniel@xxxxxxxx>
Signed-off-by: Anton Vorontsov <cbouatmailru@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/power/ds2760_battery.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/power/ds2760_battery.c
+++ b/drivers/power/ds2760_battery.c
@@ -212,7 +212,7 @@ static int ds2760_battery_read_status(st
 	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


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/