mirror of https://github.com/hak5/openwrt.git
65 lines
1.8 KiB
Diff
65 lines
1.8 KiB
Diff
|
From 2d435d52c63e4dd544938bad638ecd518cc04d1c Mon Sep 17 00:00:00 2001
|
||
|
From: Lars-Peter Clausen <lars@metafoo.de>
|
||
|
Date: Tue, 26 Oct 2010 20:13:40 +0200
|
||
|
Subject: [PATCH] POWER: jz4740-battery: Protect against concurrent battery readings
|
||
|
|
||
|
We can not handle more then one ADC request at a time to the battery. The patch
|
||
|
adds a mutex around the ADC read code to ensure this.
|
||
|
|
||
|
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
|
||
|
|
||
|
jz4740-battery: Add missing kfree(jz_battery) in jz_battery_remove()
|
||
|
|
||
|
Signed-off-by: Axel Lin <axel.lin@gmail.com>
|
||
|
Acked-By: Lars-Peter Clausen <lars@metafoo.de>
|
||
|
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
|
||
|
---
|
||
|
drivers/power/jz4740-battery.c | 8 ++++++++
|
||
|
1 files changed, 8 insertions(+), 0 deletions(-)
|
||
|
|
||
|
--- a/drivers/power/jz4740-battery.c
|
||
|
+++ b/drivers/power/jz4740-battery.c
|
||
|
@@ -47,6 +47,8 @@ struct jz_battery {
|
||
|
|
||
|
struct power_supply battery;
|
||
|
struct delayed_work work;
|
||
|
+
|
||
|
+ struct mutex lock;
|
||
|
};
|
||
|
|
||
|
static inline struct jz_battery *psy_to_jz_battery(struct power_supply *psy)
|
||
|
@@ -68,6 +70,8 @@ static long jz_battery_read_voltage(stru
|
||
|
unsigned long val;
|
||
|
long voltage;
|
||
|
|
||
|
+ mutex_lock(&battery->lock);
|
||
|
+
|
||
|
INIT_COMPLETION(battery->read_completion);
|
||
|
|
||
|
enable_irq(battery->irq);
|
||
|
@@ -91,6 +95,8 @@ static long jz_battery_read_voltage(stru
|
||
|
battery->cell->disable(battery->pdev);
|
||
|
disable_irq(battery->irq);
|
||
|
|
||
|
+ mutex_unlock(&battery->lock);
|
||
|
+
|
||
|
return voltage;
|
||
|
}
|
||
|
|
||
|
@@ -291,6 +297,7 @@ static int __devinit jz_battery_probe(st
|
||
|
jz_battery->pdev = pdev;
|
||
|
|
||
|
init_completion(&jz_battery->read_completion);
|
||
|
+ mutex_init(&jz_battery->lock);
|
||
|
|
||
|
INIT_DELAYED_WORK(&jz_battery->work, jz_battery_work);
|
||
|
|
||
|
@@ -383,6 +390,7 @@ static int __devexit jz_battery_remove(s
|
||
|
|
||
|
iounmap(jz_battery->base);
|
||
|
release_mem_region(jz_battery->mem->start, resource_size(jz_battery->mem));
|
||
|
+ kfree(jz_battery);
|
||
|
|
||
|
return 0;
|
||
|
}
|