i2c: Use resource_size macro

This replace all instances in the i2c busses tree of
res->end - res->start + 1 with the handy macro resource_size(res)
from ioport.h (coming in from platform_device.h).

This was created with a simple
sed -i -e 's/\([a-z]*\)->end *- *[a-z]*->start *+ *1/resource_size(\1)/g'

Then manually replacing the PXA redefiniton of the same kind
of macro manually. Recompiled some ARM defconfigs I could find to
make a rough test so it shouldn't break anything, though I
couldn't see exactly which configs you need for all the drivers.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/i2c/busses/i2c-versatile.c b/drivers/i2c/busses/i2c-versatile.c
index fede619ba227..70de82163463 100644
--- a/drivers/i2c/busses/i2c-versatile.c
+++ b/drivers/i2c/busses/i2c-versatile.c
@@ -76,7 +76,7 @@ static int i2c_versatile_probe(struct platform_device *dev)
                 goto err_out;
         }
 
-        if (!request_mem_region(r->start, r->end - r->start + 1, "versatile-i2c")) {
+        if (!request_mem_region(r->start, resource_size(r), "versatile-i2c")) {
                 ret = -EBUSY;
                 goto err_out;
         }
@@ -87,7 +87,7 @@ static int i2c_versatile_probe(struct platform_device *dev)
                 goto err_release;
         }
 
-        i2c->base = ioremap(r->start, r->end - r->start + 1);
+        i2c->base = ioremap(r->start, resource_size(r));
         if (!i2c->base) {
                 ret = -ENOMEM;
                 goto err_free;
@@ -118,7 +118,7 @@ static int i2c_versatile_probe(struct platform_device *dev)
  err_free:
         kfree(i2c);
  err_release:
-        release_mem_region(r->start, r->end - r->start + 1);
+        release_mem_region(r->start, resource_size(r));
  err_out:
         return ret;
 }