From: Joe Perches <joe@perches.com>
Date: Wed, 23 Mar 2011 19:55:37 +0000 (-0700)
Subject: arm: mach-u300/gpio: Fix mem_region resource size miscalculations
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=b0c3af5ef0d7b38eb1ba522becd47123ac9736d2;p=deliverable%2Flinux.git

arm: mach-u300/gpio: Fix mem_region resource size miscalculations

Convert off-by-1 r->end - r->start to resource_size(r)

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---

diff --git a/arch/arm/mach-u300/gpio.c b/arch/arm/mach-u300/gpio.c
index d92790140fe5..94837a4e146b 100644
--- a/arch/arm/mach-u300/gpio.c
+++ b/arch/arm/mach-u300/gpio.c
@@ -581,8 +581,7 @@ static int __init gpio_probe(struct platform_device *pdev)
 	if (!memres)
 		goto err_no_resource;
 
-	if (request_mem_region(memres->start, memres->end - memres->start, "GPIO Controller")
-	    == NULL) {
+	if (!request_mem_region(memres->start, resource_size(memres), "GPIO Controller")) {
 		err = -ENODEV;
 		goto err_no_ioregion;
 	}
@@ -640,7 +639,7 @@ static int __init gpio_probe(struct platform_device *pdev)
 		free_irq(gpio_ports[i].irq, &gpio_ports[i]);
 	iounmap(virtbase);
  err_no_ioremap:
-	release_mem_region(memres->start, memres->end - memres->start);
+	release_mem_region(memres->start, resource_size(memres));
  err_no_ioregion:
  err_no_resource:
 	clk_disable(clk);
@@ -660,7 +659,7 @@ static int __exit gpio_remove(struct platform_device *pdev)
 	for (i = 0 ; i < U300_GPIO_NUM_PORTS; i++)
 		free_irq(gpio_ports[i].irq, &gpio_ports[i]);
 	iounmap(virtbase);
-	release_mem_region(memres->start, memres->end - memres->start);
+	release_mem_region(memres->start, resource_size(memres));
 	clk_disable(clk);
 	clk_put(clk);
 	return 0;