tree c79d5bc1a94c2b6886826e170decad8f55cd6c2a
parent 3399a3f7464a624db1b365dbce0fef0ef4636c05
author Paolo Bonzini <pbonzini@redhat.com> 1435311886 +0200
committer Jens Axboe <axboe@fb.com> 1435427014 -0600

block: fix bogus EFAULT error from SG_IO ioctl

Whenever blk_fill_sghdr_rq fails, its errno code is ignored and changed to
EFAULT.  This can cause very confusing errors:

  $ sg_persist -k /dev/sda
  persistent reservation in: pass through os error: Bad address

The fix is trivial, just propagate the return value from
blk_fill_sghdr_rq.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>