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| author | Pankaj Dubey <pankaj.dubey@samsung.com> | 2014-09-27 09:47:55 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-10-30 09:40:11 -0700 |
| commit | 07ab621703f543a9628aaed7046970a4ff27aa83 (patch) | |
| tree | cbe48a553da31a5d76c6a88f7909f46749cec45e /drivers/base | |
| parent | d188fcff2da6903278f5514546a5e82236d0cb40 (diff) | |
| download | linux-07ab621703f543a9628aaed7046970a4ff27aa83.tar.gz linux-07ab621703f543a9628aaed7046970a4ff27aa83.tar.bz2 linux-07ab621703f543a9628aaed7046970a4ff27aa83.zip | |
regmap: fix NULL pointer dereference in _regmap_write/read
commit 5336be8416a71b5568d2cf54a2f2066abe9f2a53 upstream.
If LOG_DEVICE is defined and map->dev is NULL it will lead to NULL
pointer dereference. This patch fixes this issue by adding check for
dev->NULL in all such places in regmap.c
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/regmap/regmap.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 283644e5d31f..bb8182f9b755 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1395,7 +1395,7 @@ int _regmap_write(struct regmap *map, unsigned int reg, } #ifdef LOG_DEVICE - if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) + if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0) dev_info(map->dev, "%x <= %x\n", reg, val); #endif @@ -2045,7 +2045,7 @@ static int _regmap_read(struct regmap *map, unsigned int reg, ret = map->reg_read(context, reg, val); if (ret == 0) { #ifdef LOG_DEVICE - if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0) + if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0) dev_info(map->dev, "%x => %x\n", reg, *val); #endif |