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regmap: Check readable regs in _regmap_read 

Check if regs are readable.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Michal Simek 2014-02-10 12:59:46 +01:00 committed by Mark Brown
parent 676970da5c
commit d4807ad2c4
1 changed files with 3 additions and 0 deletions
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3
drivers/base/regmap/regmap.c
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@ -1736,6 +1736,9 @@ static int _regmap_read(struct regmap *map, unsigned int reg,
if (map->cache_only)
return -EBUSY;
if (!regmap_readable(map, reg))
return -EIO;
ret = map->reg_read(context, reg, val);
if (ret == 0) {
#ifdef LOG_DEVICE