commit 5021d709b31b ("tty: serial: Use fifo in 8250 console driver")
erroneous tries to read the FCR register content, but this register is
write-only.
This patch fixes that by reading the content from the port struct fcr
field.
Thanks to Jon Hunter and Jiri Slaby.
Suggested-by: Jiri Slaby <jirislaby@xxxxxxxxxx>
Reported-by: Jon Hunter <jonathanh@xxxxxxxxxx>
Signed-off-by: Wander Lairson Costa <wander@xxxxxxxxxx>
---
drivers/tty/serial/8250/8250_port.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 2abb3de11a48..9f3fa9fe2a4e 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -3410,7 +3410,7 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s,
use_fifo = (up->capabilities & UART_CAP_FIFO) &&
port->fifosize > 1 &&
- (serial_port_in(port, UART_FCR) & UART_FCR_ENABLE_FIFO) &&
+ (up->fcr & UART_FCR_ENABLE_FIFO) &&
/*
* After we put a data in the fifo, the controller will send
* it regardless of the CTS state. Therefore, only use fifo
--
2.35.1
