diff options
Diffstat (limited to 'xen/drivers')
| -rw-r--r-- | xen/drivers/char/pl011.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/xen/drivers/char/pl011.c b/xen/drivers/char/pl011.c index e4bd702f3f..3ea0d41f8c 100644 --- a/xen/drivers/char/pl011.c +++ b/xen/drivers/char/pl011.c @@ -104,6 +104,8 @@ static void __init pl011_init_preirq(struct serial_port *port) { /* Baud rate already set: read it out from the divisor latch. */ divisor = (pl011_read(uart, IBRD) << 6) | (pl011_read(uart, FBRD)); + if (!divisor) + early_panic("pl011: No Baud rate configured\n"); uart->baud = (uart->clock_hz << 2) / divisor; } /* This write must follow FBRD and IBRD writes. */ |