[PATCH] 8250 serial console update uart_8250_port ier

Kumar Gala
2006-02-07T15:00:33Z

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 withouth 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>

---
commit 0614711f0208f50e81d55283add8ae41bc332fc7
tree 1da4194744b9ca1fe59976c6ebffccfee40299eb
parent 45a38d42185df3e328e35e5167f2bfe181361db9
author Kumar Gala <galak@kernel.crashing.org> Tue, 07 Feb 2006 08:51:26 -0600
committer Kumar Gala <galak@kernel.crashing.org> Tue, 07 Feb 2006 08:51:26 -0600

drivers/serial/8250.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 179c1f0..b1fc97d 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2229,6 +2229,7 @@ serial8250_console_write(struct console
* and restore the IER
*/
wait_for_xmitr(up, BOTH_EMPTY);
+ up->ier |= UART_IER_THRI;
serial_out(up, UART_IER, ier | UART_IER_THRI);
}