block: return errors from blk_execute_rq()

mainline inclusion
from mainline-v5.14-rc1
commit  fb9b16e1
category: bugfix
bugzilla: 185778 https://gitee.com/openeuler/kernel/issues/I4LM14


CVE: NA

-----------------------------------------

The synchronous blk_execute_rq() had not provided a way for its callers
to know if its request was successful or not. Return the blk_status_t
result of the request.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Link: https://lore.kernel.org/r/20210610214437.641245-4-kbusch@kernel.org


Signed-off-by: Jens Axboe <axboe@kernel.dk>

conflict: 1. in blkdev.h and blk-exec, blk_execute_rq return value
change;
	  2. input parameter in blk_execute_rq is not the same as
	     mainline;
Signed-off-by: zhangwensheng <zhangwensheng5@huawei.com>
Reviewed-by: qiulaibin <qiulaibin@huawei.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>