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UPSTREAM: regulator: core: Clear the supply pointer if enabling fails

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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>
(cherry picked from commit 8e5356a736)

Change-Id: I3e83852db8c624fdd5b6c0bcab42c07289501a58
Signed-off-by: David Wu <david.wu@rock-chips.com>
This commit is contained in:
Jon Hunter
2016-04-21 17:11:58 +01:00
committed by Huang, Tao
parent faf68e977e
commit 2ba368178b
1 changed files with 1 additions and 0 deletions
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drivers/regulator/core.c
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@@ -1595,6 +1595,7 @@ static int regulator_resolve_supply(struct regulator_dev *rdev)
ret = regulator_enable(rdev->supply);
if (ret < 0) {
_regulator_put(rdev->supply);
rdev->supply = NULL;
return ret;
}
}