From: Axel Lin <axel.lin@gmail.com>
Date: Mon, 26 Jul 2010 07:34:14 +0000 (+0800)
Subject: ab3100: fix off-by-one value range checking for voltage selector
X-Git-Tag: Ubuntu-5.13.0-19.19~31000^2~3
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=979da89a9c230381ca55ea0764428a5d42a01e7f;p=mirror_ubuntu-jammy-kernel.git

ab3100: fix off-by-one value range checking for voltage selector

We use voltage selector as an array index for typ_voltages.
Thus the valid range for voltage selector should be 0..voltages_len-1.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
---

diff --git a/drivers/regulator/ab3100.c b/drivers/regulator/ab3100.c
index 7b14a67bdca2..11790990277a 100644
--- a/drivers/regulator/ab3100.c
+++ b/drivers/regulator/ab3100.c
@@ -286,7 +286,7 @@ static int ab3100_list_voltage_regulator(struct regulator_dev *reg,
 {
 	struct ab3100_regulator *abreg = reg->reg_data;
 
-	if (selector > abreg->voltages_len)
+	if (selector >= abreg->voltages_len)
 		return -EINVAL;
 	return abreg->typ_voltages[selector];
 }
@@ -318,7 +318,7 @@ static int ab3100_get_voltage_regulator(struct regulator_dev *reg)
 	regval &= 0xE0;
 	regval >>= 5;
 
-	if (regval > abreg->voltages_len) {
+	if (regval >= abreg->voltages_len) {
 		dev_err(&reg->dev,
 			"regulator register %02x contains an illegal voltage setting\n",
 			abreg->regreg);