tree ed2430c80a710895825ae71e52f1382b456a6b0c
parent 00661dd855b5b174aa176a9ab9437d86ef4f8f1a
author Ben Dooks <ben.dooks@codethink.co.uk> 1447857673 +0000
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1450065588 -0800

ARM: meson: serial: tx_empty fails to check for transmitter busy

The tx_empty() uart_op should only return empty if both the transmit fifo
and the transmit state-machine are both idle. Add a test for the hardware's
XMIT_BUSY flag.

Note, this is possibly related to an issue where the port is being shutdown
with paritally transmitted characters in it.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Reported-by: Edward Cragg <edward.cragg@codethink.co.uk>
Tested-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>