stmmac: use resource_size()

The size calculation is not correct.  It should be end - start + 1.
Use resource_size() to calculate it instead.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c
index a6733612d64a66fb5f083699254d792da867bacf..92bef30de092c340ce6c317a1e7ed312a127e95c 100644 (file)
--- a/drivers/net/stmmac/stmmac_main.c
+++ b/drivers/net/stmmac/stmmac_main.c
@@ -1685,8 +1685,7 @@ static int stmmac_dvr_probe(struct platform_device *pdev)
        }
        pr_info("done!\n");
 
-       if (!request_mem_region(res->start, (res->end - res->start),
-                               pdev->name)) {
+       if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
                pr_err("%s: ERROR: memory allocation failed"
                       "cannot get the I/O addr 0x%x\n",
                       __func__, (unsigned int)res->start);
@@ -1694,9 +1693,9 @@ static int stmmac_dvr_probe(struct platform_device *pdev)
                goto out;
        }
 
-       addr = ioremap(res->start, (res->end - res->start));
+       addr = ioremap(res->start, resource_size(res));
        if (!addr) {
-               pr_err("%s: ERROR: memory mapping failed \n", __func__);
+               pr_err("%s: ERROR: memory mapping failed\n", __func__);
                ret = -ENOMEM;
                goto out;
        }
@@ -1774,7 +1773,7 @@ static int stmmac_dvr_probe(struct platform_device *pdev)
 out:
        if (ret < 0) {
                platform_set_drvdata(pdev, NULL);
-               release_mem_region(res->start, (res->end - res->start));
+               release_mem_region(res->start, resource_size(res));
                if (addr != NULL)
                        iounmap(addr);
        }
@@ -1812,7 +1811,7 @@ static int stmmac_dvr_remove(struct platform_device *pdev)
 
        iounmap((void *)ndev->base_addr);
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       release_mem_region(res->start, (res->end - res->start));
+       release_mem_region(res->start, resource_size(res));
 
        free_netdev(ndev);