[IRDA]: Replace hard-coded dev_self[] array sizes with ARRAY_SIZE()

Several IR drivers used "for (i = 0; i < 4; i++)" to walk their
dev_self[] table.  Better to use ARRAY_SIZE().  And fix ali-ircc so it
won't run off the end if we find too many adapters.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/net/irda/via-ircc.c b/drivers/net/irda/via-ircc.c
index 8bafb455c102..79b85f327500 100644
--- a/drivers/net/irda/via-ircc.c
+++ b/drivers/net/irda/via-ircc.c
@@ -279,7 +279,7 @@ static void via_ircc_clean(void)
 
         IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
 
-        for (i=0; i < 4; i++) {
+        for (i=0; i < ARRAY_SIZE(dev_self); i++) {
                 if (dev_self[i])
                         via_ircc_close(dev_self[i]);
         }
@@ -327,6 +327,9 @@ static __devinit int via_ircc_open(int i, chipio_t * info, unsigned int id)
 
         IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
 
+        if (i >= ARRAY_SIZE(dev_self))
+                return -ENOMEM;
+
         /* Allocate new instance of the driver */
         dev = alloc_irdadev(sizeof(struct via_ircc_cb));
         if (dev == NULL)