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regmap: cache: bail in regmap_async_complete() for bus-less maps

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Commit f8bd822cb ("regmap: cache: Factor out block sync") made
regcache_rbtree_sync() call regmap_async_complete(), which in turn does
not check for map->bus before dereferencing it.

This causes a NULL pointer dereference on bus-less maps.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Cc: stable@vger.kernel.org [v3.10 only]
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Daniel Mack 2013-07-04 13:11:03 +02:00 committed by Mark Brown
parent 8bb495e3f0
commit f2e055e7c9
1 changed files with 1 additions and 1 deletions
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drivers/base/regmap/regmap.c
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@ -1717,7 +1717,7 @@ int regmap_async_complete(struct regmap *map)
int ret;
/* Nothing to do with no async support */
if (!map->bus->async_write)
if (!map->bus || !map->bus->async_write)
return 0;
trace_regmap_async_complete_start(map->dev);