staging: wlags49_h2: Handle sysfs_create_group return correctly
The function returns 0 on success and non-zero on error. So correctly record the status so it is freed appropriately. Signed-off-by: NDavid Kilroy <kilroyd@googlemail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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