This is a note to let you know that I've just added the patch titled
regulator: max77686: fix gpio_enabled shift wrapping bug
to the 4.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
regulator-max77686-fix-gpio_enabled-shift-wrapping-bug.patch
and it can be found in the queue-4.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From c53403a37cf083ce85da720f18918f73580d0064 Mon Sep 17 00:00:00 2001
From: Joe Perches <[email protected]>
Date: Mon, 18 May 2015 10:01:03 -0700
Subject: regulator: max77686: fix gpio_enabled shift wrapping bug
From: Joe Perches <[email protected]>
commit c53403a37cf083ce85da720f18918f73580d0064 upstream.
The code should handle more than 32 bits here because "id"
can be a value up to MAX77686_REGULATORS (currently 34).
Convert the gpio_enabled type to DECLARE_BITMAP and use
test_bit/set_bit.
Fixes: 3307e9025d29 ("regulator: max77686: Add GPIO control")
Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Joe Perches <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/regulator/max77686.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/regulator/max77686.c
+++ b/drivers/regulator/max77686.c
@@ -88,7 +88,7 @@ enum max77686_ramp_rate {
};
struct max77686_data {
- u64 gpio_enabled:MAX77686_REGULATORS;
+ DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS);
/* Array indexed by regulator id */
unsigned int opmode[MAX77686_REGULATORS];
@@ -121,7 +121,7 @@ static unsigned int max77686_map_normal_
case MAX77686_BUCK8:
case MAX77686_BUCK9:
case MAX77686_LDO20 ... MAX77686_LDO22:
- if (max77686->gpio_enabled & (1 << id))
+ if (test_bit(id, max77686->gpio_enabled))
return MAX77686_GPIO_CONTROL;
}
@@ -277,7 +277,7 @@ static int max77686_of_parse_cb(struct d
}
if (gpio_is_valid(config->ena_gpio)) {
- max77686->gpio_enabled |= (1 << desc->id);
+ set_bit(desc->id, max77686->gpio_enabled);
return regmap_update_bits(config->regmap, desc->enable_reg,
desc->enable_mask,
Patches currently in stable-queue which might be from [email protected] are
queue-4.0/regulator-max77686-fix-gpio_enabled-shift-wrapping-bug.patch
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