[U-Boot] [PATCH 1/8] test/py: fix timeout to be absolute

[Lukasz Majewski <l.majewski@samsung.com>]

Hi Stephen,

> From: Stephen Warren <swarren@nvidia.com>
> 
> Currently, Spawn.expect() imposes its timeout solely upon receipt of
> new data, not on its overall operation. In theory, this could cause
> the timeout not to fire if U-Boot continually generated output that
> did not match the expected patterns.
> 
> Fix the code to additionally impose a timeout on overall operation,
> which is the intended mode of operation.
> 
> Signed-off-by: Stephen Warren <swarren@nvidia.com>
> ---
>  test/py/u_boot_spawn.py | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/test/py/u_boot_spawn.py b/test/py/u_boot_spawn.py
> index 1baee63df25c..df4c67597cab 100644
> --- a/test/py/u_boot_spawn.py
> +++ b/test/py/u_boot_spawn.py
> @@ -122,6 +122,7 @@ class Spawn(object):
>              if type(patterns[pi]) == type(''):
>                  patterns[pi] = re.compile(patterns[pi])
>  
> +        tstart_s = time.time()
>          try:
>              while True:
>                  earliest_m = None
> @@ -142,7 +143,11 @@ class Spawn(object):
>                      self.after = self.buf[pos:posafter]
>                      self.buf = self.buf[posafter:]
>                      return earliest_pi
> -                events = self.poll.poll(self.timeout)
> +                tnow_s = time.time()
> +                tdelta_ms = (tnow_s - tstart_s) * 1000
> +                if tdelta_ms > self.timeout:
> +                    raise Timeout()
> +                events = self.poll.poll(self.timeout - tdelta_ms)
>                  if not events:
>                      raise Timeout()
>                  c = os.read(self.fd, 1024)

Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>

-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group