block: remove the blk_execute_rq return value
The function only returns -EIO if rq->errors is non-zero, which is not very useful and lets a large number of callers ignore the return value. Just let the callers figure out their error themselves. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de> Reviewed-by: NBart Van Assche <Bart.VanAssche@sandisk.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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