From: Yin Kangkai <redacted>

For any reason if the NS16550A was not work in high speed mode (e.g. we hold
NS16550A from going to high speed mode in autoconfig_16550a()), now we are
resume from suspend, we should also set the uartclk to the correct
value. Otherwise it is still the old 1843200 and that will bring issues.

CC: Greg Kroah-Hartman <redacted>
CC: David Woodhouse <dwmw2@infradead.org>
CC: linux-kernel@vger.kernel.org
CC: stable@kernel.org
Signed-off-by: Yin Kangkai <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/tty/serial/8250.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
index 3975df6..c10a6a9 100644
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c

@@ -3036,6 +3036,7 @@ void serial8250_resume_port(int line)
 		serial_outp(up, 0x04, tmp);
 
 		serial_outp(up, UART_LCR, 0);
+		up->port.uartclk = 921600*16;
 	}
 	uart_resume_port(&serial8250_reg, &up->port);
 }

-- 
1.7.4.1