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regulator: core: Clear the supply pointer if enabling fails 

During the resolution of a regulator's supply, we may attempt to enable
the supply if the regulator itself is already enabled. If enabling the
supply fails, then we will call _regulator_put() for the supply.
However, the pointer to the supply has not been cleared for the
regulator and this will cause a crash if we then unregister the
regulator and attempt to call regulator_put() a second time for the
supply. Fix this by clearing the supply pointer if enabling the supply
after fails when resolving the supply for a regulator.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jon Hunter 2016-04-21 17:11:58 +01:00 committed by Mark Brown
parent 7ddede6a58
commit 8e5356a736
1 changed files with 1 additions and 0 deletions
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drivers/regulator/core.c
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@ -1536,6 +1536,7 @@ static int regulator_resolve_supply(struct regulator_dev *rdev)
ret = regulator_enable(rdev->supply); ret = regulator_enable(rdev->supply);
if (ret < 0) { if (ret < 0) {
_regulator_put(rdev->supply); _regulator_put(rdev->supply);
rdev->supply = NULL;
return ret; return ret;
} }
} }