diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-09-24 12:31:34 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-09-24 12:31:34 +0400 |
| commit | e6aa0f07cb5e81a7cbeaf3be6e2101234c2f0d30 (patch) | |
| tree | 77926550ac0c31b1423bcf193a4ed0ecb7fda2c1 /drivers/base/class.c | |
| parent | d4738792fb86600b6cb7220459d9c47e819b3580 (diff) | |
| parent | 72d31053f62c4bc464c2783974926969614a8649 (diff) | |
| download | linux-e6aa0f07cb5e81a7cbeaf3be6e2101234c2f0d30.tar.xz | |
Merge commit 'v2.6.27-rc7' into x86/microcode
Diffstat (limited to 'drivers/base/class.c')
| -rw-r--r-- | drivers/base/class.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/base/class.c b/drivers/base/class.c index 839d27cecb36..cc5e28c8885c 100644 --- a/drivers/base/class.c +++ b/drivers/base/class.c @@ -198,6 +198,7 @@ static void class_create_release(struct class *cls) * class_create - create a struct class structure * @owner: pointer to the module that is to "own" this struct class * @name: pointer to a string for the name of this class. + * @key: the lock_class_key for this class; used by mutex lock debugging * * This is used to create a struct class pointer that can then be used * in calls to device_create(). @@ -294,6 +295,12 @@ int class_for_each_device(struct class *class, struct device *start, if (!class) return -EINVAL; + if (!class->p) { + WARN(1, "%s called for class '%s' before it was initialized", + __func__, class->name); + return -EINVAL; + } + mutex_lock(&class->p->class_mutex); list_for_each_entry(dev, &class->p->class_devices, node) { if (start) { @@ -343,6 +350,11 @@ struct device *class_find_device(struct class *class, struct device *start, if (!class) return NULL; + if (!class->p) { + WARN(1, "%s called for class '%s' before it was initialized", + __func__, class->name); + return NULL; + } mutex_lock(&class->p->class_mutex); list_for_each_entry(dev, &class->p->class_devices, node) { |