diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/mux.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/serial/mux.c b/drivers/serial/mux.c index f5b17f5333f..ea9cbda7796 100644 --- a/drivers/serial/mux.c +++ b/drivers/serial/mux.c @@ -83,19 +83,20 @@ static struct timer_list mux_timer; */ static int __init get_mux_port_count(struct parisc_device *dev) { + int status; u8 iodc_data[32]; unsigned long bytecnt; - int status = pdc_iodc_read(&bytecnt, dev->hpa.start, 0, iodc_data, 32); - BUG_ON(status != PDC_OK); - /* If this is the built-in Mux for the K-Class (Eole CAP/MUX), * we only need to allocate resources for 1 port since the * other 7 ports are not connected. */ - if(((iodc_data[0] << 4) | ((iodc_data[1] & 0xf0) >> 4)) == 0x15) + if(dev->id.hversion == 0x15) return 1; + status = pdc_iodc_read(&bytecnt, dev->hpa.start, 0, iodc_data, 32); + BUG_ON(status != PDC_OK); + /* Return the number of ports specified in the iodc data. */ return ((((iodc_data)[4] & 0xf0) >> 4) * 8) + 8; } |