tree fdf47e68cc5fc916da5d985f797b262c36997c4e
parent 4c195ad88b7df54b2e7340dec3446aee6ca84cd1
author Mike Frysinger <michael.frysinger@analog.com> 1198496405 +0800
committer Bryan Wu <cooloney@kernel.org> 1198496405 +0800

[Blackfin] serial driver: fix bug - cache the bits of the LSR on systems where the LSR is read-to-clear

Cache the bits of the LSR on systems where the LSR is read-to-clear
so that we can safely read the LSR in random places.  this fixes
older parts where break/framing/parity/overflow was not being detected
at all in PIO mode, and this fixes newer parts where
break/framing/parity/overflow was being reported all the time
without being cleared.

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>