[LTP] [PATCH v2] pty04: Retry reads when short

[Petr Vorel]

Hi Richard,

> Even though reads are blocking and packets are flipped into the netdevice
> buffer whole, it seems read may return before a full packet is read into user
> land. Retrying read should prevent timeouts and read failures on some
> machines.
I'm still able to block the test after some loops:
pty04.c:328: PASS: Read netdev 1
(using 5.7.0-rc4 from openSUSE Tumbleweed).

Kind regards,
Petr