linux-kernel - [PATCH] regmap: debugfs: Work around GCC flow analysis false positives

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Date:	Sat, 26 Jan 2013 18:01:18 +0800
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	linux-kernel@...r.kernel.org
Cc:	Vincent Stehlé <v-stehle@...com>,
	Arnd Bergmann <arnd@...db.de>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH] regmap: debugfs: Work around GCC flow analysis false positives

Reported-by: Vincent Stehlé <v-stehle@...com>
Reported-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
---
 drivers/base/regmap/regmap-debugfs.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index d9a6c94..c6dc2e9 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -133,6 +133,13 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map,
 		return base;
 	}
 
+	/*
+	 * Work around GCC flow analysis - it can't figure out we have
+	 * at least one loop iteration.
+	 */
+	*pos = c->min;
+	ret = c->base_reg;
+
 	/* Find the relevant block */
 	list_for_each_entry(c, &map->debugfs_off_cache, list) {
 		if (from >= c->min && from <= c->max) {
-- 
1.7.10.4

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