linux-kernel - [PATCH 7/7] regmap: Ensure we scream if we enable cache bypass/only at the same time

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Message-Id: <1317206627-6673-7-git-send-email-dp@opensource.wolfsonmicro.com>
Date:	Wed, 28 Sep 2011 11:43:47 +0100
From:	Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	linux-kernel@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>
Subject: [PATCH 7/7] regmap: Ensure we scream if we enable cache bypass/only at the same time

Signed-off-by: Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>
---
 drivers/base/regmap/regcache.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index a3f466c..3d59f14 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -282,6 +282,8 @@ EXPORT_SYMBOL_GPL(regcache_sync);
  */
 void regcache_cache_only(struct regmap *map, bool enable)
 {
+	BUG_ON(map->cache_bypass && enable);
+
 	mutex_lock(&map->sync_lock);
 	map->cache_only = enable;
 	mutex_unlock(&map->sync_lock);
@@ -301,6 +303,8 @@ EXPORT_SYMBOL_GPL(regcache_cache_only);
  */
 void regcache_cache_bypass(struct regmap *map, bool enable)
 {
+	BUG_ON(map->cache_only && enable);
+
 	mutex_lock(&map->sync_lock);
 	map->cache_bypass = enable;
 	mutex_unlock(&map->sync_lock);
-- 
1.7.6.4

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