linux-kernel - [PATCH V1] regulator: core: Fix voltage change propagations to supply regulators

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-next>] [day] [month] [year] [list]

Message-Id: <1495706597-10605-1-git-send-email-tirupath@codeaurora.org>
Date:   Thu, 25 May 2017 15:33:17 +0530
From:   Tirupathi Reddy <tirupath@...eaurora.org>
To:     broonie@...nel.org, lgirdwood@...il.com
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Tirupathi Reddy <tirupath@...eaurora.org>
Subject: [PATCH V1] regulator: core: Fix voltage change propagations to supply regulators

Some regulators support get_voltage and some support get_voltage_sel
operations. Do voltage change propagation only when the current
regulator has a minimum dropout voltage specified or if the current
regulator lacks both get_voltage and get_voltage_sel operations.

Signed-off-by: Tirupathi Reddy <tirupath@...eaurora.org>
---
 drivers/regulator/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index c0d9ae8..9fecbd4 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2938,7 +2938,8 @@ static int regulator_set_voltage_unlocked(struct regulator *regulator,
 	if (rdev->supply &&
 	    regulator_ops_is_valid(rdev->supply->rdev,
 				   REGULATOR_CHANGE_VOLTAGE) &&
-	    (rdev->desc->min_dropout_uV || !rdev->desc->ops->get_voltage)) {
+	    (rdev->desc->min_dropout_uV || !(rdev->desc->ops->get_voltage ||
+					   rdev->desc->ops->get_voltage_sel))) {
 		int current_supply_uV;
 		int selector;
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation