drbd: fix error return code in drbd_init()
Fix to return a negative error code from the error handling case instead of 0, as returned elsewhere in this function. Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: NLars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: NAndreas Gruenbacher <agruen@linbit.com> Signed-off-by: NPhilipp Reisner <philipp.reisner@linbit.com> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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