[PATCH] DM9000 - better checks for platform resources

The current DM9000 driver cannot cope if it
is given more than 3 resources (for example, if
it is being passed an wake-up irq that it is
not using yet).

Check that we have been given at-least one IRQ
resource.

Also fix the minor type-casting for the case
of 2 resources.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 6 insertions, 11 deletions

diff --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c
index 24996da4c1c4..631e0d9f2e40 100644
--- a/drivers/net/dm9000.c
+++ b/drivers/net/dm9000.c
@@ -410,10 +410,7 @@ dm9000_probe(struct platform_device *pdev)
         if (pdev->num_resources < 2) {
                 ret = -ENODEV;
                 goto out;
-        }
-
-        switch (pdev->num_resources) {
-        case 2:
+        } else if (pdev->num_resources == 2) {
                 base = pdev->resource[0].start;
 
                 if (!request_mem_region(base, 4, ndev->name)) {
@@ -423,17 +420,16 @@ dm9000_probe(struct platform_device *pdev)
 
                 ndev->base_addr = base;
                 ndev->irq = pdev->resource[1].start;
-                db->io_addr = (void *)base;
-                db->io_data = (void *)(base + 4);
-
-                break;
+                db->io_addr = (void __iomem *)base;
+                db->io_data = (void __iomem *)(base + 4);
 
-        case 3:
+        } else {
                 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
                 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
                 db->irq_res  = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 
-                if (db->addr_res == NULL || db->data_res == NULL) {
+                if (db->addr_res == NULL || db->data_res == NULL ||
+                    db->irq_res == NULL) {
                         printk(KERN_ERR PFX "insufficient resources\n");
                         ret = -ENOENT;
                         goto out;
@@ -482,7 +478,6 @@ dm9000_probe(struct platform_device *pdev)
 
                 /* ensure at least we have a default set of IO routines */
                 dm9000_set_io(db, iosize);
-
         }
 
         /* check to see if anything is being over-ridden */