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authorLinus Torvalds <torvalds@linux-foundation.org>2011-08-06 12:21:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-08-06 12:21:19 -0700
commitf38092b50f6e68d046ada7d2a4b3ecbbeab29fb4 (patch)
treee9da23bda0270a04478f29e8eda9b8cc6460d0b6
parent4b00e4b3940eabb38adeec0823751820fe2d6fda (diff)
parent5389102e231d5f06da8b2897336293db18af9d76 (diff)
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Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: Battery: sysfs_remove_battery(): possible circular locking
-rw-r--r--drivers/acpi/battery.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 87c0a8daa99a..7711d94a0409 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -99,6 +99,7 @@ enum {
struct acpi_battery {
struct mutex lock;
+ struct mutex sysfs_lock;
struct power_supply bat;
struct acpi_device *device;
struct notifier_block pm_nb;
@@ -573,16 +574,16 @@ static int sysfs_add_battery(struct acpi_battery *battery)
static void sysfs_remove_battery(struct acpi_battery *battery)
{
- mutex_lock(&battery->lock);
+ mutex_lock(&battery->sysfs_lock);
if (!battery->bat.dev) {
- mutex_unlock(&battery->lock);
+ mutex_unlock(&battery->sysfs_lock);
return;
}
device_remove_file(battery->bat.dev, &alarm_attr);
power_supply_unregister(&battery->bat);
battery->bat.dev = NULL;
- mutex_unlock(&battery->lock);
+ mutex_unlock(&battery->sysfs_lock);
}
/*
@@ -982,6 +983,7 @@ static int acpi_battery_add(struct acpi_device *device)
strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
device->driver_data = battery;
mutex_init(&battery->lock);
+ mutex_init(&battery->sysfs_lock);
if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle,
"_BIX", &handle)))
set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
@@ -1010,6 +1012,7 @@ static int acpi_battery_add(struct acpi_device *device)
fail:
sysfs_remove_battery(battery);
mutex_destroy(&battery->lock);
+ mutex_destroy(&battery->sysfs_lock);
kfree(battery);
return result;
}
@@ -1027,6 +1030,7 @@ static int acpi_battery_remove(struct acpi_device *device, int type)
#endif
sysfs_remove_battery(battery);
mutex_destroy(&battery->lock);
+ mutex_destroy(&battery->sysfs_lock);
kfree(battery);
return 0;
}