[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>

diff --git a/drivers/net/irda/ali-ircc.c b/drivers/net/irda/ali-ircc.c
index e3c8cd5..68d4c41 100644 (file)
--- a/drivers/net/irda/ali-ircc.c
+++ b/drivers/net/irda/ali-ircc.c
@@ -249,7 +249,7 @@ static void __exit ali_ircc_cleanup(void)
 
        IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__); 
 
-       for (i=0; i < 4; i++) {
+       for (i=0; i < ARRAY_SIZE(dev_self); i++) {
                if (dev_self[i])
                        ali_ircc_close(dev_self[i]);
        }
@@ -273,6 +273,12 @@ static int ali_ircc_open(int i, chipio_t *info)
        int err;
                        
        IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__); 
+
+       if (i >= ARRAY_SIZE(dev_self)) {
+               IRDA_ERROR("%s(), maximum number of supported chips reached!\n",
+                          __FUNCTION__);
+               return -ENOMEM;
+       }
        
        /* Set FIR FIFO and DMA Threshold */
        if ((ali_ircc_setup(info)) == -1)

diff --git a/drivers/net/irda/irport.c b/drivers/net/irda/irport.c
index 44efd49..ba4f3eb 100644 (file)
--- a/drivers/net/irda/irport.c
+++ b/drivers/net/irda/irport.c
@@ -1090,7 +1090,7 @@ static int __init irport_init(void)
 {
        int i;
 
-       for (i=0; (io[i] < 2000) && (i < 4); i++) {
+       for (i=0; (io[i] < 2000) && (i < ARRAY_SIZE(dev_self)); i++) {
                if (irport_open(i, io[i], irq[i]) != NULL)
                        return 0;
        }
@@ -1112,7 +1112,7 @@ static void __exit irport_cleanup(void)
 
         IRDA_DEBUG( 4, "%s()\n", __FUNCTION__);
 
-       for (i=0; i < 4; i++) {
+       for (i=0; i < ARRAY_SIZE(dev_self); i++) {
                if (dev_self[i])
                        irport_close(dev_self[i]);
        }

diff --git a/drivers/net/irda/via-ircc.c b/drivers/net/irda/via-ircc.c
index 8bafb45..79b85f3 100644 (file)
--- 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) 

diff --git a/drivers/net/irda/w83977af_ir.c b/drivers/net/irda/w83977af_ir.c
index 0ea65c4..8421597 100644 (file)
--- a/drivers/net/irda/w83977af_ir.c
+++ b/drivers/net/irda/w83977af_ir.c
@@ -117,7 +117,7 @@ static int __init w83977af_init(void)
 
        IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
 
-       for (i=0; (io[i] < 2000) && (i < 4); i++) { 
+       for (i=0; (io[i] < 2000) && (i < ARRAY_SIZE(dev_self)); i++) {
                if (w83977af_open(i, io[i], irq[i], dma[i]) == 0)
                        return 0;
        }
@@ -136,7 +136,7 @@ static void __exit w83977af_cleanup(void)
 
         IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
 
-       for (i=0; i < 4; i++) {
+       for (i=0; i < ARRAY_SIZE(dev_self); i++) {
                if (dev_self[i])
                        w83977af_close(dev_self[i]);
        }