dm resume: don't return EINVAL when signalled
If the dm_resume method is called on a device that is not suspended, the method will suspend the device briefly, before resuming it (so that the table will be swapped). However, there was a bug that the return value of dm_suspended_md was not checked. dm_suspended_md may return an error when it is interrupted by a signal. In this case, do_resume would call dm_swap_table, which would return -EINVAL. This commit fixes the logic, so that error returned by dm_suspend is checked and the resume operation is undone. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Khazhismel Kumykov <khazhy@google.com> Cc: stable@vger.kernel.org
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