regulator: core: fix race condition in regulator_put()

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commit 83b0302d34 upstream.

The regulator framework maintains a list of consumer regulators
for a regulator device and protects it from concurrent access using
the regulator device's mutex lock.

In the case of regulator_put() the consumer is removed and regulator
device's parameters are updated without holding the regulator device's
mutex. This would lead to a race condition between the regulator_put()
and any function which traverses the consumer list or modifies regulator
device's parameters.
Fix this race condition by holding the regulator device's mutex in case
of regulator_put.

Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

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Ashay Jaiswal 2015-01-08 18:54:25 +05:30 • committed by Luis Henriques

parent a15eb0ce52

commit 032d538aea

1 changed files with 3 additions and 1 deletions

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drivers/regulator/core.c

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