linux-kernel - Re: [PATCH] regulator: Fix recursive mutex lockdep warning

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Date:	Tue, 03 Jul 2012 15:47:54 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
CC:	Liam Girdwood <lrg@...com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] regulator: Fix recursive mutex lockdep warning

On 07/03/12 15:43, Mark Brown wrote:
>
>> What do you think about removing the locking in get_voltage? Is that better?
> There's already an unlocked version of get_voltage()?

Yes, I'm suggesting we just use that unlocked version for all of the
code that gets the input voltage.

index ef07b62..4c63336 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -628,7 +628,7 @@ static void drms_uA_update(struct regulator_dev *rdev)
        /* get input voltage */
        input_uV = 0;
        if (rdev->supply)
-               input_uV = regulator_get_voltage(rdev->supply);
+               input_uV = _regulator_get_voltage(rdev->supply->rdev);
        if (input_uV <= 0)
                input_uV = rdev->constraints->input_uV;
        if (input_uV <= 0)
@@ -2582,7 +2582,7 @@ int regulator_set_optimum_mode(struct regulator *regulator, int uA_load)
        /* get input voltage */
        input_uV = 0;
        if (rdev->supply)
-               input_uV = regulator_get_voltage(rdev->supply);
+               input_uV = _regulator_get_voltage(rdev->supply->rdev);
        if (input_uV <= 0)
                input_uV = rdev->constraints->input_uV;
        if (input_uV <= 0) {


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

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