diff options
| author | Marcel Moolenaar <marcel@FreeBSD.org> | 2004-11-15 00:00:24 +0000 |
|---|---|---|
| committer | Marcel Moolenaar <marcel@FreeBSD.org> | 2004-11-15 00:00:24 +0000 |
| commit | bfa307a39c9f01c3e241209e684e5a1a1e5b7528 (patch) | |
| tree | e372164c8fced9ab7fe3dc7ed444eda849892b0c /sys/dev/uart/uart_dev_ns8250.c | |
| parent | a0c88fb1d91c8773dae530925a271d4a2735b9b6 (diff) | |
Notes
Diffstat (limited to 'sys/dev/uart/uart_dev_ns8250.c')
| -rw-r--r-- | sys/dev/uart/uart_dev_ns8250.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/sys/dev/uart/uart_dev_ns8250.c b/sys/dev/uart/uart_dev_ns8250.c index 975ed4dabaa54..5869d3384eda6 100644 --- a/sys/dev/uart/uart_dev_ns8250.c +++ b/sys/dev/uart/uart_dev_ns8250.c @@ -468,7 +468,7 @@ static int ns8250_bus_ioctl(struct uart_softc *sc, int request, intptr_t data) { struct uart_bas *bas; - int divisor, error; + int baudrate, divisor, error; uint8_t efr, lcr; bas = &sc->sc_bas; @@ -522,7 +522,11 @@ ns8250_bus_ioctl(struct uart_softc *sc, int request, intptr_t data) uart_barrier(bas); uart_setreg(bas, REG_LCR, lcr); uart_barrier(bas); - *(int*)data = bas->rclk / divisor / 16; + baudrate = (divisor > 0) ? bas->rclk / divisor / 16 : 0; + if (baudrate > 0) + *(int*)data = baudrate; + else + error = ENXIO; break; default: error = EINVAL; |