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