From: collinsd@codeaurora.org (David Collins)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/2] regulator: Fix regulator_enable deadlock and add uA_load propagation
Date: Mon, 28 Mar 2011 08:34:40 -0700 [thread overview]
Message-ID: <1301326482-6547-1-git-send-email-collinsd@codeaurora.org> (raw)
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.
David Collins (2):
regulator: Remove possible deadlock from regulator_enable
regulator: Propagate uA_load requirements up supply chain
drivers/regulator/core.c | 147 +++++++++++++++++++++++++++++++-------
include/linux/regulator/driver.h | 5 ++
2 files changed, 125 insertions(+), 27 deletions(-)
--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
next reply other threads:[~2011-03-28 15:34 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-28 15:34 David Collins [this message]
2011-03-28 15:34 ` [PATCH 1/2] regulator: Remove possible deadlock from regulator_enable David Collins
2011-03-28 18:11 ` Mark Brown
2011-03-28 18:22 ` David Collins
2011-03-28 15:34 ` [PATCH 2/2] regulator: Propagate uA_load requirements up supply chain David Collins
2011-03-28 18:02 ` Mark Brown
2011-03-28 18:14 ` Russell King - ARM Linux
2011-03-29 7:53 ` Mark Brown
2011-03-29 8:28 ` Russell King - ARM Linux
2011-03-29 8:40 ` Mark Brown
2011-03-28 18:18 ` David Collins
2011-03-28 18:33 ` broonie@gmail.com
2011-03-28 23:52 ` [PATCH v2 0/2] regulator: Fix regulator_enable deadlock and add uA_load propagation David Collins
2011-03-28 23:53 ` [PATCH v2 1/2] regulator: Remove possible deadlock from regulator_enable David Collins
2011-03-28 23:53 ` [PATCH v2 2/2] regulator: Propagate uA_load requirements up supply chain David Collins
2011-03-29 8:44 ` Mark Brown
2011-03-29 16:08 ` David Collins
2011-03-29 21:20 ` Mark Brown
2011-03-30 1:00 ` Mark Brown
2011-03-29 22:40 ` Mark Brown
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