drivers/w1/w1_int.c: call put_device if device_register fails

Currently, memsetting and kfreeing the device is bad behaviour.  The
device will have a reference count of 1 and hence can cause trouble
because it has kfree'd.  Proper way to handle a failed device_register is
to call put_device right after it fails.

Signed-off-by: Levente Kurusa <levex@linux.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index 590bd8a7cd1bf3f071b145a7a48c47c30cabe510..32be1a1a3e9ccc14f948edce7730ee9ae3e8b7c7 100644 (file)
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -90,9 +90,8 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
        err = device_register(&dev->dev);
        if (err) {
                printk(KERN_ERR "Failed to register master device. err=%d\n", err);
-               memset(dev, 0, sizeof(struct w1_master));
-               kfree(dev);
-               dev = NULL;
+               put_device(&dev->dev);
+               return NULL;
        }
 
        return dev;