--- drivers/serial/8250.c

+++ drivers/serial/8250.c

@@ -255,7 +255,8 @@ static const struct serial8250_config ua

.fifo_size = 128,

.tx_loadsz = 128,

.fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,

- .flags = UART_CAP_FIFO | UART_CAP_EFR | UART_CAP_SLEEP,

+ /* UART_CAP_EFR breaks billionon CF bluetooth card. */

+ .flags = UART_CAP_FIFO | UART_CAP_SLEEP,

},

[PORT_RSA] = {

.name = "RSA",