[PATCH 1/2] regmap: Bypass the cache when applying patches

[Mark Brown]

Otherwise any patch that affects a register which is writable may trash
cached values.

Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
 drivers/base/regmap/regcache.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 0d54668..bfe48e4 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -268,6 +268,7 @@ int regcache_sync(struct regmap *map)
 	trace_regcache_sync(map->dev, name, "start");
 
 	/* Apply any patch first */
+	map->cache_bypass = 1;
 	for (i = 0; i < map->patch_regs; i++) {
 		ret = _regmap_write(map, map->patch[i].reg, map->patch[i].def);
 		if (ret != 0) {
@@ -276,6 +277,7 @@ int regcache_sync(struct regmap *map)
 			goto out;
 		}
 	}
+	map->cache_bypass = 0;
 
 	if (!map->cache_dirty)
 		goto out;
-- 
1.7.9.rc1

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