drivers/ata: use resource_size

Use the function resource_size, which reduces the chance of introducing
off-by-one errors in calculating the resource size.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
struct resource *res;
@@

- (res->end - res->start) + 1
+ resource_size(res)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

4 files changed, 7 insertions, 7 deletions

diff --git a/drivers/ata/pata_octeon_cf.c b/drivers/ata/pata_octeon_cf.c
index e807cc3b6ab4..d6f69561dc86 100644
--- a/drivers/ata/pata_octeon_cf.c
+++ b/drivers/ata/pata_octeon_cf.c
@@ -841,7 +841,7 @@ static int __devinit octeon_cf_probe(struct platform_device *pdev)
         ocd = pdev->dev.platform_data;
 
         cs0 = devm_ioremap_nocache(&pdev->dev, res_cs0->start,
-                                   res_cs0->end - res_cs0->start + 1);
+                                   resource_size(res_cs0));
 
         if (!cs0)
                 return -ENOMEM;
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index d8d743af3225..3f6ebc6c665a 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -151,14 +151,14 @@ int __devinit __pata_platform_probe(struct device *dev,
          */
         if (mmio) {
                 ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start,
-                                io_res->end - io_res->start + 1);
+                                resource_size(io_res));
                 ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start,
-                                ctl_res->end - ctl_res->start + 1);
+                                resource_size(ctl_res));
         } else {
                 ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start,
-                                io_res->end - io_res->start + 1);
+                                resource_size(io_res));
                 ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start,
-                                ctl_res->end - ctl_res->start + 1);
+                                resource_size(ctl_res));
         }
         if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) {
                 dev_err(dev, "failed to map IO/CTL base\n");
diff --git a/drivers/ata/pata_rb532_cf.c b/drivers/ata/pata_rb532_cf.c
index 8e3cdef8a25f..45f1e10f917b 100644
--- a/drivers/ata/pata_rb532_cf.c
+++ b/drivers/ata/pata_rb532_cf.c
@@ -151,7 +151,7 @@ static __devinit int rb532_pata_driver_probe(struct platform_device *pdev)
         info->irq = irq;
 
         info->iobase = devm_ioremap_nocache(&pdev->dev, res->start,
-                                res->end - res->start + 1);
+                                resource_size(res));
         if (!info->iobase)
                 return -ENOMEM;
 
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index c19417e02208..17f9ff9067a2 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -4013,7 +4013,7 @@ static int mv_platform_probe(struct platform_device *pdev)
 
         host->iomap = NULL;
         hpriv->base = devm_ioremap(&pdev->dev, res->start,
-                                   res->end - res->start + 1);
+                                   resource_size(res));
         hpriv->base -= SATAHC0_REG_BASE;
 
         /*