linux-kernel - [PATCH v3 12/18] staging: hikey9xx: hi6421v600-regulator: fix get_optimum

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

Message-Id: <7b981bc43760502e3ad3553ca9480cf861346457.1611048785.git.mchehab+huawei@kernel.org>
Date:   Tue, 19 Jan 2021 11:14:17 +0100
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     Mark Brown <broonie@...nel.org>, Lee Jones <lee.jones@...aro.org>
Cc:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mayulong <mayulong1@...wei.com>, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 12/18] staging: hikey9xx: hi6421v600-regulator: fix get_optimum_mode

During the driver refactor, a regression broke the logic inside
hi6421_spmi_regulator_get_optimum_mode(). Basically, if a LDO
has eco_uA == 0, it doesn't support economic mode. So, it should
return REGULATOR_MODE_NORMAL.

If economic mode is supported, it can return either
REGULATOR_MODE_IDLE or REGULATOR_MODE_NORMAL, depending on the
load current.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
 drivers/staging/hikey9xx/hi6421v600-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/hikey9xx/hi6421v600-regulator.c b/drivers/staging/hikey9xx/hi6421v600-regulator.c
index 72dd779d85e6..5fe77b490166 100644
--- a/drivers/staging/hikey9xx/hi6421v600-regulator.c
+++ b/drivers/staging/hikey9xx/hi6421v600-regulator.c
@@ -206,7 +206,7 @@ hi6421_spmi_regulator_get_optimum_mode(struct regulator_dev *rdev,
 {
 	struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
 
-	if (load_uA || ((unsigned int)load_uA > sreg->eco_uA))
+	if (!sreg->eco_uA || ((unsigned int)load_uA > sreg->eco_uA))
 		return REGULATOR_MODE_NORMAL;
 
 	return REGULATOR_MODE_IDLE;
-- 
2.29.2