drivers: net: irda: use resource_size() in au1k_ir.c

This uses the resource_size() function instead of explicit computation.

Signed-off-by: Silviu-Mihai Popescu <silviupopescu1990@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/net/irda/au1k_ir.c b/drivers/net/irda/au1k_ir.c
index b5151e4ced61..56f1e6d6e4eb 100644
--- a/drivers/net/irda/au1k_ir.c
+++ b/drivers/net/irda/au1k_ir.c
@@ -27,6 +27,7 @@
 #include <linux/slab.h>
 #include <linux/time.h>
 #include <linux/types.h>
+#include <linux/ioport.h>
 
 #include <net/irda/irda.h>
 #include <net/irda/irmod.h>
@@ -882,12 +883,12 @@ static int au1k_irda_probe(struct platform_device *pdev)
                 goto out;
 
         err = -EBUSY;
-        aup->ioarea = request_mem_region(r->start, r->end - r->start + 1,
+        aup->ioarea = request_mem_region(r->start, resource_size(r),
                                          pdev->name);
         if (!aup->ioarea)
                 goto out;
 
-        aup->iobase = ioremap_nocache(r->start, r->end - r->start + 1);
+        aup->iobase = ioremap_nocache(r->start, resource_size(r));
         if (!aup->iobase)
                 goto out2;