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[SERIAL] 8250 serial console update uart_8250_port ier

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On some embedded PowerPC (MPC834x) systems an extra byte would some
times be required to flush data out of the fifo.
serial8250_console_write() was updating the IER in hardware without
also updating the copy in uart_8250_port. This causes issues functions
like serial8250_start_tx() and __stop_tx() to misbehave.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Kumar Gala 2006-02-08 21:34:35 +00:00 committed by Russell King
parent 620739025b
commit f5968b37b3
1 changed files with 1 additions and 0 deletions
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drivers/serial/8250.c
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@ -2229,6 +2229,7 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
* and restore the IER
*/
wait_for_xmitr(up, BOTH_EMPTY);
up->ier |= UART_IER_THRI;
serial_out(up, UART_IER, ier | UART_IER_THRI);
}