tests: lib: filter out SSP timeouts

[majunkier]

In legacy SSP driver, DMA request request is enabled during FIFO drain, causing DMA keeps filling FIFO and preventing empty, which leads to timeout. ERROR is logged by poll_for_register_delay() while ssp_empty_tx_fifo() returns WARN, so there is inconsistent error handling between this two functions.

Issue#4369 describe issue on older firmware version.

[marc-hb]

This looks fragile and it's located in the main/critical spot. Also, it's losing the -B 2 and -A 1 context.

Do you really care about other errors on those old platforms? If not, you could just go all the way, extend 706a9d8 and ignore those legacy platforms completely.

If you still care about other errors on legacy systems, then it's simpler not to duplicate the first grep and not lose the context with only 2 greps like this:

  SSP_timeout_msgs=(
    -e 'poll timeout reg .* mask .* val .* us .*'
    -e 'ssp_empty_tx_fifo() warning: timeout' 
  )

  grep -v "${SSP_timeout_msgs[@]}" "$1" |
       grep -B 2 -A 1 -i --word-regexp -e 'ERR' -e 'ERROR' -e '<err>' -e OSError 

So the last grep gives you the exit status wanted.

Or:

  case "$platf" in
  abd|def)
     SSP_timeout_msgs=(
    -e 'poll timeout reg .* mask .* val .* us .*'
    -e 'ssp_empty_tx_fifo() warning: timeout' 
    );;
  *)
  # dummy string so it's never empty
   SSP_timeout_msgs=(
    -e dummy_ztring_Never_matches 
   ) ;;
  esac

  grep -v  "${SSP_timeout_msgs[@]}" "$1" |
       grep -B 2 -A 1 -i --word-regexp -e 'ERR' -e 'ERROR' -e '<err>' -e OSError

[majunkier]

thank you for suggestion! you were absolutely correct, i have implemented and tested your example