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 <[email protected]> Signed-off-by: Mark Brown <[email protected]>
kusora · Jun 19, 2013 · d6814a7 · d6814a7
1 parent d856fce
commit d6814a7
Showing 1 changed file with 4 additions and 0 deletions.
diff --git 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.