Driver core: plug device probe memory leak

Make sure data is freed if the kthread fails to start.

Signed-off-by: Duncan Sands <baldrick@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index b5f43c3..ef7db69 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -178,7 +178,7 @@
 		probe_task = kthread_run(really_probe, data,
 					 "probe-%s", dev->bus_id);
 		if (IS_ERR(probe_task))
-			ret = PTR_ERR(probe_task);
+			ret = really_probe(data);
 	} else
 		ret = really_probe(data);