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From: Stephan Gerhold <stephan@gerhold.net>
To: Mark Brown <broonie@kernel.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>,
	linux-kernel@vger.kernel.org,
	Stephan Gerhold <stephan@gerhold.net>,
	Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH 1/2] regulator: ab8500: Remove AB8505 USB regulator
Date: Wed,  6 Nov 2019 18:31:24 +0100
Message-ID: <20191106173125.14496-1-stephan@gerhold.net> (raw)

The USB regulator was removed for AB8500 in
commit 41a06aa738ad ("regulator: ab8500: Remove USB regulator").
It was then added for AB8505 in
commit 547f384f33db ("regulator: ab8500: add support for ab8505").

However, there was never an entry added for it in
ab8505_regulator_match. This causes all regulators after it
to be initialized with the wrong device tree data, eventually
leading to an out-of-bounds array read.

Given that it is not used anywhere in the kernel, it seems
likely that similar arguments against supporting it exist for
AB8505 (it is controlled by hardware).

Therefore, simply remove it like for AB8500 instead of adding
an entry in ab8505_regulator_match.

Fixes: 547f384f33db ("regulator: ab8500: add support for ab8505")
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
---
 drivers/regulator/ab8500.c       | 17 -----------------
 include/linux/regulator/ab8500.h |  1 -
 2 files changed, 18 deletions(-)

diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c
index efb2f01a9101..f60e1b26c2d2 100644
--- a/drivers/regulator/ab8500.c
+++ b/drivers/regulator/ab8500.c
@@ -953,23 +953,6 @@ static struct ab8500_regulator_info
 		.update_val_idle	= 0x82,
 		.update_val_normal	= 0x02,
 	},
-	[AB8505_LDO_USB] = {
-		.desc = {
-			.name           = "LDO-USB",
-			.ops            = &ab8500_regulator_mode_ops,
-			.type           = REGULATOR_VOLTAGE,
-			.id             = AB8505_LDO_USB,
-			.owner          = THIS_MODULE,
-			.n_voltages     = 1,
-			.volt_table	= fixed_3300000_voltage,
-		},
-		.update_bank            = 0x03,
-		.update_reg             = 0x82,
-		.update_mask            = 0x03,
-		.update_val		= 0x01,
-		.update_val_idle	= 0x03,
-		.update_val_normal	= 0x01,
-	},
 	[AB8505_LDO_AUDIO] = {
 		.desc = {
 			.name		= "LDO-AUDIO",
diff --git a/include/linux/regulator/ab8500.h b/include/linux/regulator/ab8500.h
index 7cf8f797e13a..505e94a6e3e8 100644
--- a/include/linux/regulator/ab8500.h
+++ b/include/linux/regulator/ab8500.h
@@ -37,7 +37,6 @@ enum ab8505_regulator_id {
 	AB8505_LDO_AUX6,
 	AB8505_LDO_INTCORE,
 	AB8505_LDO_ADC,
-	AB8505_LDO_USB,
 	AB8505_LDO_AUDIO,
 	AB8505_LDO_ANAMIC1,
 	AB8505_LDO_ANAMIC2,
-- 
2.23.0


             reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-06 17:31 Stephan Gerhold [this message]
2019-11-06 17:31 ` [PATCH 2/2] regulator: ab8500: Remove SYSCLKREQ from enum ab8505_regulator_id Stephan Gerhold
2019-11-07  8:02   ` Linus Walleij
2019-11-07 13:13   ` Applied "regulator: ab8500: Remove SYSCLKREQ from enum ab8505_regulator_id" to the regulator tree Mark Brown
2019-11-07  8:02 ` [PATCH 1/2] regulator: ab8500: Remove AB8505 USB regulator Linus Walleij
2020-01-10  8:02   ` Naresh Kamboju
2020-01-10  8:16     ` Greg Kroah-Hartman
2019-11-07 13:13 ` Applied "regulator: ab8500: Remove AB8505 USB regulator" to the regulator tree Mark Brown

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