linux-kernel - [PATCH] sm501.c: use resource

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Message-ID: <BD79186B4FD85F4B8E60E381CAEE190901FB1105@mi8nycmail19.Mi8.com>
Date:	Fri, 11 Dec 2009 18:55:41 -0500
From:	"H Hartley Sweeten" <hartleys@...ionengravers.com>
To:	"kernel list" <linux-kernel@...r.kernel.org>
Cc:	"Ben Dooks" <ben-linux@...ff.org>, <sameo@...ux.intel.com>
Subject: [PATCH] sm501.c: use resource_size()

The requested memory region is smaller than the actual ioremap().
Use resource_size() to get the correct size.

Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Ben Dooks <ben-linux@...ff.org>
Cc: Samuel Ortiz <sameo@...ux.intel.com>

---

diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index 0cc5eef..dc9ea95 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -1430,7 +1430,7 @@ static int __devinit sm501_plat_probe(struct platform_device *dev)
 	}
 
 	sm->regs_claim = request_mem_region(sm->io_res->start,
-					    0x100, "sm501");
+					    resource_size(sm->io_res), "sm501");
 
 	if (sm->regs_claim == NULL) {
 		dev_err(&dev->dev, "cannot claim registers\n");
@@ -1440,8 +1440,7 @@ static int __devinit sm501_plat_probe(struct platform_device *dev)
 
 	platform_set_drvdata(dev, sm);
 
-	sm->regs = ioremap(sm->io_res->start,
-			   (sm->io_res->end - sm->io_res->start) - 1);
+	sm->regs = ioremap(sm->io_res->start, resource_size(sm->io_res));
 
 	if (sm->regs == NULL) {
 		dev_err(&dev->dev, "cannot remap registers\n");
@@ -1645,7 +1644,7 @@ static int __devinit sm501_pci_probe(struct pci_dev *dev,
 	sm->mem_res = &dev->resource[0];
 
 	sm->regs_claim = request_mem_region(sm->io_res->start,
-					    0x100, "sm501");
+					    resource_size(sm->io_res), "sm501");
 	if (sm->regs_claim == NULL) {
 		dev_err(&dev->dev, "cannot claim registers\n");
 		err= -EBUSY; 
--
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