s390/ccwgroup: fix an uninitialized return code
Since commit 0b60f9ea "s390: use device_remove_file_self() instead of device_schedule_callback()" the return code of ccwgroup_ungroup_store is uninitialized. Make sure the rc is always initialized. Signed-off-by:Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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