tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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fbdev: clps711x-fb: Request memory region for MMIO

Use devm_platform_get_and_ioremap_resource() for resource 0 (the MMIO
control register range) instead of open-coding platform_get_resource()
and devm_ioremap() separately. The helper requests the memory region
before mapping it, which registers the range in /proc/iomem and prevents
another driver from mapping the same registers.

This makes resource 0 consistent with resource 1 (the framebuffer),
which already uses devm_platform_get_and_ioremap_resource().

Assisted-by: Claude:claude-sonnet-4-6
Signed-off-by: Amit Barzilai <amit.barzilai22@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>

authored by

Amit Barzilai and committed by
Helge Deller a40c0e81 d2386d9e

+3 -6
+3 -6
drivers/video/fbdev/clps711x-fb.c
··· 216 216 cfb = info->par; 217 217 platform_set_drvdata(pdev, info); 218 218 219 - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 220 - if (!res) 221 - goto out_fb_release; 222 - cfb->base = devm_ioremap(dev, res->start, resource_size(res)); 223 - if (!cfb->base) { 224 - ret = -ENOMEM; 219 + cfb->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 220 + if (IS_ERR(cfb->base)) { 221 + ret = PTR_ERR(cfb->base); 225 222 goto out_fb_release; 226 223 } 227 224