linux-kernel - [PATCH V2] regulator: Add check for supply rail

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

Date:	Tue,  3 Jan 2012 12:41:40 +0530
From:	Laxman Dewangan <ldewangan.com@...dia.com>
To:	broonie@...nsource.wolfsonmicro.com, lrg@...com
Cc:	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-tegra@...r.kernel.org, ldewangan@...dia.com
Subject: [PATCH V2] regulator: Add check for supply rail

From: Laxman Dewangan <ldewangan@...dia.com>

When consumer of any rails query about whether rail is enabled
or not, the function regulator_is_enabled() should return enabled
only if requested rail and supply rail (both) are enabled.
If any one of these rails is enabled then function should return as
not enabled.

Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
---
The commit message and synopsis is changed in this patch.

 drivers/regulator/core.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index dbdebed..d914435 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1701,6 +1701,12 @@ int regulator_is_enabled(struct regulator *regulator)
 {
 	int ret;
 
+	if (regulator->rdev->supply) {
+		ret = regulator_is_enabled(regulator->rdev->supply);
+		if (ret <= 0)
+			return ret;
+	}
+
 	mutex_lock(&regulator->rdev->mutex);
 	ret = _regulator_is_enabled(regulator->rdev);
 	mutex_unlock(&regulator->rdev->mutex);
-- 
1.7.1.1

--
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/