Commit 5a24d4b6 authored Oct 13, 2017 by Sergei Shtylyov Committed by Linus Walleij Oct 31, 2017

gpio-rcar: use devm_ioremap_resource()



Using devm_ioremap_resource() has several advantages over devm_ioremap():
- it checks the passed resource's validity;
- it calls devm_request_mem_region() to check for the resource overlap;
- it prints an error message in case of error.

We can call devm_ioremap_resource() instead of devm_ioremap_nocache()
as ioremap() and ioremap_nocache()  are implemented identically on ARM.
Doing this saves 2 LoCs and 80 bytes (AArch64 gcc 4.8.5).

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

parent 80057cb4

drivers/gpio/gpio-rcar.c

+6 −8

Original line number	Diff line number	Diff line
		@@ -452,19 +452,17 @@ static int gpio_rcar_probe(struct platform_device *pdev)

		pm_runtime_enable(dev);

		io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);

		if (!io \|\| !irq) {
		dev_err(dev, "missing IRQ or IOMEM\n");
		if (!irq) {
		dev_err(dev, "missing IRQ\n");
		ret = -EINVAL;
		goto err0;
		}

		p->base = devm_ioremap_nocache(dev, io->start, resource_size(io));
		if (!p->base) {
		dev_err(dev, "failed to remap I/O memory\n");
		ret = -ENXIO;
		io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		p->base = devm_ioremap_resource(dev, io);
		if (IS_ERR(p->base)) {
		ret = PTR_ERR(p->base);
		goto err0;
		}