linux-kernel - [PATCH 2/4] regmap: Correct offset handling in regmap_volatile

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Date:   Mon, 12 Feb 2018 18:15:45 +0000
From:   Charles Keepax <ckeepax@...nsource.cirrus.com>
To:     <broonie@...nel.org>
CC:     <david.rhodes@...rus.com>, <linux-kernel@...r.kernel.org>,
        <patches@...nsource.cirrus.com>
Subject: [PATCH 2/4] regmap: Correct offset handling in regmap_volatile_range

The current implementation is broken for regmaps that have a reg_stride,
since it doesn't take the stride into account. Correct this by using the
helper function to calculate the register offset.

Fixes: f01ee60fffa4 ("regmap: implement register striding")
Signed-off-by: Charles Keepax <ckeepax@...nsource.cirrus.com>
---
 drivers/base/regmap/regmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index c7b7c5fa73ab4..2339b98f1b6e4 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -174,7 +174,7 @@ static bool regmap_volatile_range(struct regmap *map, unsigned int reg,
 	unsigned int i;
 
 	for (i = 0; i < num; i++)
-		if (!regmap_volatile(map, reg + i))
+		if (!regmap_volatile(map, reg + regmap_get_offset(map, i)))
 			return false;
 
 	return true;
-- 
2.11.0