1 files changed, 10 insertions, 3 deletions

diff --git a/drivers/net/hamradio/baycom_ser_fdx.c b/drivers/net/hamradio/baycom_ser_fdx.c
index 30baf6ecfc63..17ac6975d70d 100644
--- 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);