From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Wed, 29 May 2013 14:54:54 +0000 (+0100)
Subject: regmap: debugfs: Suppress cache for partial register files
X-Git-Tag: accepted/tizen/common/20141203.182822~1948^2~3^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d6814a7dafa590ec5fe0597922ea76354f9bec59;p=platform%2Fkernel%2Flinux-arm64.git

regmap: debugfs: Suppress cache for partial register files

The cache is based on the full register map so confuses things if used
for a partial map.

Reported-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 23b701f..6864009 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -84,6 +84,10 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map,
 	unsigned int fpos_offset;
 	unsigned int reg_offset;
 
+	/* Suppress the cache if we're using a subrange */
+	if (from)
+		return from;
+
 	/*
 	 * If we don't have a cache build one so we don't have to do a
 	 * linear scan each time.