From f5968b37b3ad35b682b574b578843a0361218aff Mon Sep 17 00:00:00 2001 From: Kumar Gala <galak@kernel.crashing.org> Date: Wed, 8 Feb 2006 21:34:35 +0000 Subject: [SERIAL] 8250 serial console update uart_8250_port ier 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> --- drivers/serial/8250.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/serial/8250.c') diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 179c1f065e60..b1fc97d5f643 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -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); } -- cgit v1.2.3-70-g09d2