If a command times out, we resubmit a retry. Some devices, however, buffer
everything we send and then eventually reply to a command we have timed out
already. We receive a bad tag, send a new command, device replies to the
one sent before, and so on without end.

The fix is to flush pending replies if tags mismatch (by reading them).
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>