[linux-lvm] clvmd-corosync should check lksb.sb_status instead of return code ?

[Xinwei Hu]

Hi all,

  In clvmd-corosync, lock_resource calls dlm_ls_lock_wait with flags
set to LKF_NOQUEUE.
  When LKF_NOQUEUE is set, the return code of dlm_ls_lock_wait is
always 0, while the actual errno is in lksb.sb_status.

  This causes problem when using vgchange -aey or something like.

  I attached a patch to try to fix this issue.

  Please help to review. Thanks.
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