baycom_ser_fdx: also allow i/o ports >= 0x1000 and enhanced failure logging

The baycom_ser_fdx driver did not allow i/o ports >= 0x1000.  Now that
there are pci cards (with rs232 ports) which use for example 0xb800 this
limit should not exists.

Also, for non kernel coders find the cause of problems was challenging so I
added extra logging.

Signed-off-by: Folkert van Heusden <folkert@vanheusden.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/net/hamradio/baycom_ser_fdx.c b/drivers/net/hamradio/baycom_ser_fdx.c
index 30baf6ecfc63c6eabe38eaa2dfd40a4b68677148..17ac6975d70db9d0d1fdbe35487c03a2a1d1fa38 100644 (file)
--- a/drivers/net/hamradio/baycom_ser_fdx.c
+++ b/drivers/net/hamradio/baycom_ser_fdx.c
@@ -415,11 +415,18 @@ static int ser12_open(struct net_device *dev)
 
        if (!dev || !bc)
                return -ENXIO;
-       if (!dev->base_addr || dev->base_addr > 0x1000-SER12_EXTENT ||
-           dev->irq < 2 || dev->irq > 15)
+       if (!dev->base_addr || dev->base_addr > 0xffff-SER12_EXTENT ||
+           dev->irq < 2 || dev->irq > NR_IRQS) {
+               printk(KERN_INFO "baycom_ser_fdx: invalid portnumber (max %u) "
+                               "or irq (2 <= irq <= %d)\n",
+                               0xffff-SER12_EXTENT, NR_IRQS);
                return -ENXIO;
-       if (bc->baud < 300 || bc->baud > 4800)
+       }
+       if (bc->baud < 300 || bc->baud > 4800) {
+               printk(KERN_INFO "baycom_ser_fdx: invalid baudrate "
+                               "(300...4800)\n");
                return -EINVAL;
+       }
        if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx")) {
                printk(KERN_WARNING "BAYCOM_SER_FSX: I/O port 0x%04lx busy \n", 
                       dev->base_addr);