linux-kernel - Applied "regulator: core: Only propagate voltage changes to if it can change voltages" to the regulator tree

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] [day] [month] [year] [list]

Message-Id: <E1cz4lf-0005gu-L5@debutante>
Date:   Fri, 14 Apr 2017 18:12:19 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Mark Brown <broonie@...nel.org>
Cc:     Dong Aisheng <aisheng.dong@....com>,
        Dong Aisheng <aisheng.dong@....com>,
        Dong Aisheng <aisheng.dong@....com>,
        linux-kernel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Applied "regulator: core: Only propagate voltage changes to if it can change voltages" to the regulator tree

The patch

   regulator: core: Only propagate voltage changes to if it can change voltages

has been applied to the regulator tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From c8b2a4b5f2ab769d921668c2e844a8b78ca0bcd4 Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@...nel.org>
Date: Thu, 13 Apr 2017 18:36:59 +0100
Subject: [PATCH] regulator: core: Only propagate voltage changes to if it can
 change voltages

When we are propagating voltage changes to parent regulators don't
bother if the parent does not have permission to change voltages.  This
simplifies error checking in the function for cases where the regulator
lacks some of the voltage operations.

Reported-by: Dong Aisheng <aisheng.dong@....com>
Tested-by: Dong Aisheng <aisheng.dong@....com>
Reviewed-by: Dong Aisheng <aisheng.dong@....com>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 drivers/regulator/core.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 04baac9a165b..33776bf5d9b4 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2921,8 +2921,10 @@ static int regulator_set_voltage_unlocked(struct regulator *regulator,
 	if (ret < 0)
 		goto out2;

-	if (rdev->supply && (rdev->desc->min_dropout_uV ||
-				!rdev->desc->ops->get_voltage)) {
+	if (rdev->supply &&
+	    regulator_ops_is_valid(rdev->supply->rdev,
+				   REGULATOR_CHANGE_VOLTAGE) &&
+	    (rdev->desc->min_dropout_uV || !rdev->desc->ops->get_voltage)) {
 		int current_supply_uV;
 		int selector;

-- 
2.11.0