linux-kernel - [PATCH 03/10] fbdev: s1d13xxxfb: use resource

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Date:   Wed,  1 Jan 2020 18:49:43 +0100
From:   Julia Lawall <Julia.Lawall@...ia.fr>
To:     Kristoffer Ericson <kristoffer.ericson@...il.com>
Cc:     kernel-janitors@...r.kernel.org,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 03/10] fbdev: s1d13xxxfb: use resource_size

Use resource_size rather than a verbose computation on
the end and start fields.

The semantic patch that makes these changes is as follows:
(http://coccinelle.lip6.fr/)

<smpl>
@@ struct resource ptr; @@
- (ptr.end - ptr.start + 1)
+ resource_size(&ptr)
</smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@...ia.fr>

---
 drivers/video/fbdev/s1d13xxxfb.c |   16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/video/fbdev/s1d13xxxfb.c b/drivers/video/fbdev/s1d13xxxfb.c
index 8048499e398d..eaea8c373753 100644
--- a/drivers/video/fbdev/s1d13xxxfb.c
+++ b/drivers/video/fbdev/s1d13xxxfb.c
@@ -746,9 +746,9 @@ s1d13xxxfb_remove(struct platform_device *pdev)
 	}
 
 	release_mem_region(pdev->resource[0].start,
-			pdev->resource[0].end - pdev->resource[0].start +1);
+			   resource_size(&pdev->resource[0]));
 	release_mem_region(pdev->resource[1].start,
-			pdev->resource[1].end - pdev->resource[1].start +1);
+			   resource_size(&pdev->resource[1]));
 	return 0;
 }
 
@@ -788,14 +788,14 @@ static int s1d13xxxfb_probe(struct platform_device *pdev)
 	}
 
 	if (!request_mem_region(pdev->resource[0].start,
-		pdev->resource[0].end - pdev->resource[0].start +1, "s1d13xxxfb mem")) {
+		resource_size(&pdev->resource[0]), "s1d13xxxfb mem")) {
 		dev_dbg(&pdev->dev, "request_mem_region failed\n");
 		ret = -EBUSY;
 		goto bail;
 	}
 
 	if (!request_mem_region(pdev->resource[1].start,
-		pdev->resource[1].end - pdev->resource[1].start +1, "s1d13xxxfb regs")) {
+		resource_size(&pdev->resource[1]), "s1d13xxxfb regs")) {
 		dev_dbg(&pdev->dev, "request_mem_region failed\n");
 		ret = -EBUSY;
 		goto bail;
@@ -810,7 +810,7 @@ static int s1d13xxxfb_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, info);
 	default_par = info->par;
 	default_par->regs = ioremap(pdev->resource[1].start,
-			pdev->resource[1].end - pdev->resource[1].start +1);
+				    resource_size(&pdev->resource[1]));
 	if (!default_par->regs) {
 		printk(KERN_ERR PFX "unable to map registers\n");
 		ret = -ENOMEM;
@@ -819,7 +819,7 @@ static int s1d13xxxfb_probe(struct platform_device *pdev)
 	info->pseudo_palette = default_par->pseudo_palette;
 
 	info->screen_base = ioremap(pdev->resource[0].start,
-			pdev->resource[0].end - pdev->resource[0].start +1);
+				    resource_size(&pdev->resource[0]));
 
 	if (!info->screen_base) {
 		printk(KERN_ERR PFX "unable to map framebuffer\n");
@@ -857,9 +857,9 @@ static int s1d13xxxfb_probe(struct platform_device *pdev)
 
 	info->fix = s1d13xxxfb_fix;
 	info->fix.mmio_start = pdev->resource[1].start;
-	info->fix.mmio_len = pdev->resource[1].end - pdev->resource[1].start + 1;
+	info->fix.mmio_len = resource_size(&pdev->resource[1]);
 	info->fix.smem_start = pdev->resource[0].start;
-	info->fix.smem_len = pdev->resource[0].end - pdev->resource[0].start + 1;
+	info->fix.smem_len = resource_size(&pdev->resource[0]);
 
 	printk(KERN_INFO PFX "regs mapped at 0x%p, fb %d KiB mapped at 0x%p\n",
 	       default_par->regs, info->fix.smem_len / 1024, info->screen_base);