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| author | Sergey SENOZHATSKY <sergey.senozhatsky.work@gmail.com> | 2015-08-31 12:54:58 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-08-31 13:38:36 +0300 |
| commit | 17649c90ff4c5246bb4babf6260029968a6d119d (patch) | |
| tree | 1d6d28160ef5288d1eb073889309053c707195e4 /drivers/base/regmap | |
| parent | 29332534e2b68b5889a40ccb6606ba0d06750a69 (diff) | |
| download | linux-17649c90ff4c5246bb4babf6260029968a6d119d.tar.xz | |
regmap: fix a NULL pointer dereference in __regmap_init
__regmap_init() may receive a NULL `struct regmap_bus *bus' pointer,
for example, from snd_hdac_regmap_init(), and it make sure that it
does not NULL deference `bus`, except around ->max_raw_read and
->max_raw_write initialisation. Add missing check.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/base/regmap')
| -rw-r--r-- | drivers/base/regmap/regmap.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index d2efa4b33294..2ffdb62f75f7 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -579,8 +579,10 @@ struct regmap *regmap_init(struct device *dev, map->use_single_read = config->use_single_rw || !bus || !bus->read; map->use_single_write = config->use_single_rw || !bus || !bus->write; map->can_multi_write = config->can_multi_write && bus && bus->write; - map->max_raw_read = bus->max_raw_read; - map->max_raw_write = bus->max_raw_write; + if (bus) { + map->max_raw_read = bus->max_raw_read; + map->max_raw_write = bus->max_raw_write; + } map->dev = dev; map->bus = bus; map->bus_context = bus_context; |