linux-kernel - [PATCH 2/5] regulator: Fix the s5m8767a problem of the division by null

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Date:	Wed, 13 Jun 2012 17:27:16 +0900
From:	Sangbeom Kim <sbkim73@...sung.com>
To:	'Mark Brown' <broonie@...nsource.wolfsonmicro.com>,
	'Liam Girdwood' <lrg@...com>
Cc:	linux-kernel@...r.kernel.org, sbkim01@...il.com
Subject: [PATCH 2/5] regulator: Fix the s5m8767a problem of the division by null

If ramp_delay is 0, delay value can be divided by zero.
This patch can fix the problem.

Signed-off-by: Sangbeom Kim <sbkim73@...sung.com>
---
 drivers/regulator/s5m8767.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index 4edf344..ce9dda2 100644
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -451,7 +451,7 @@ static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
 
 	desc = reg_voltage_map[reg_id];
 
-	if (old_sel < new_sel)
+	if ((old_sel < new_sel) && s5m8767->ramp_delay)
 		return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
 					s5m8767->ramp_delay * 1000);
 	return 0;
-- 
1.7.1


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