linux-kernel - [PATCH] regulator: ti-abb: Fix off-by-one valid range checking for abb->current_info

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Date:	Sat, 04 May 2013 22:02:27 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Mark Brown <broonie@...nel.org>
Cc:	"Andrii.Tseglytskyi" <andrii.tseglytskyi@...com>,
	Nishanth Menon <nm@...com>, Liam Girdwood <lrg@...com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] regulator: ti-abb: Fix off-by-one valid range checking for
 abb->current_info_idx

abb->current_info_idx is used as array subscript to access volt_table,
thus the valid value range should be 0 ... desc->n_voltages - 1.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/regulator/ti-abb-regulator.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/ti-abb-regulator.c b/drivers/regulator/ti-abb-regulator.c
index c1870ea..870d209 100644
--- a/drivers/regulator/ti-abb-regulator.c
+++ b/drivers/regulator/ti-abb-regulator.c
@@ -387,8 +387,8 @@ static int ti_abb_get_voltage_sel(struct regulator_dev *rdev)
 		return -EINVAL;
 	}
 
-	if (abb->current_info_idx > (int)desc->n_voltages) {
-		dev_err(dev, "%s: Corrupted data? idx(%d) > n_voltages(%d)\n",
+	if (abb->current_info_idx >= (int)desc->n_voltages) {
+		dev_err(dev, "%s: Corrupted data? idx(%d) >= n_voltages(%d)\n",
 			__func__, abb->current_info_idx, desc->n_voltages);
 		return -EINVAL;
 	}
-- 
1.8.1.2



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