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Subject[PATCH 7/8] Driver core: Fix cleanup when failing device_add().
Date
From: Cornelia Huck <cornelia.huck@de.ibm.com>

Driver core: Fix cleanup when failing device_add().

- Don't call cleanup_device_parent() if we didn't call setup_parent().
- dev->kobj.parent may be NULL when cleanup_device_parent() is called,
so we need to handle glue_dir == NULL in cleanup_glue_dir().

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/base/core.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 7f59c2f..7de543d 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -621,7 +621,8 @@ static struct kobject *get_device_parent(struct device *dev,
static void cleanup_glue_dir(struct device *dev, struct kobject *glue_dir)
{
/* see if we live in a "glue" directory */
- if (!dev->class || glue_dir->kset != &dev->class->class_dirs)
+ if (!glue_dir || !dev->class ||
+ glue_dir->kset != &dev->class->class_dirs)
return;

kobject_put(glue_dir);
@@ -773,7 +774,7 @@ int device_add(struct device *dev)
dev = get_device(dev);
if (!dev || !strlen(dev->bus_id)) {
error = -EINVAL;
- goto Error;
+ goto Done;
}

pr_debug("device: '%s': %s\n", dev->bus_id, __FUNCTION__);
--
1.5.4.3


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