linux-kernel - [PATCH v2 0/2] regulator: Fix regulator_enable deadlock and add uA

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1301356355-7546-1-git-send-email-collinsd@codeaurora.org>
Date:	Mon, 28 Mar 2011 16:52:35 -0700
From:	David Collins <collinsd@...eaurora.org>
To:	Liam Girdwood <lrg@...mlogic.co.uk>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-arm-msm-owner@...r.kernel.org,
	David Collins <collinsd@...eaurora.org>
Subject: [PATCH v2 0/2] regulator: Fix regulator_enable deadlock and add uA_load propagation

Because the uA_load propagation change takes out a lock on a regulator and
then the regulators that it supplies, it will cause deadlock with the current
regulator_enable implementation.  regulator_disable can also deadlock with
regulator_enable, but it requires two threads and precise timing to observe.
Therefore, regulator_enable must be fixed before current propagation can be
used.

Changes from v1:
	- Renamed _regulator_enable to regulator_dev_enable.
	- Made change logs more verbose.

David Collins (2):
  regulator: Remove possible deadlock from regulator_enable
  regulator: Propagate uA_load requirements up supply chain

 drivers/regulator/core.c         |  151 ++++++++++++++++++++++++++++++-------
 include/linux/regulator/driver.h |    5 +
 2 files changed, 127 insertions(+), 29 deletions(-)

-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/