forked from Minki/linux
x86: change early_gart_iommu_check() back to any_mapped
Kevin Winchester reported a GART related direct rendering failure against linux-next-20080611, which shows up via these log entries: PCI: Using ACPI for IRQ routing PCI: Cannot allocate resource region 0 of device 0000:00:00.0 agpgart: Detected AGP bridge 0 agpgart: Aperture conflicts with PCI mapping. agpgart: Aperture from AGP @ e0000000 size 128 MB agpgart: Aperture conflicts with PCI mapping. agpgart: No usable aperture found. agpgart: Consider rebooting with iommu=memaper=2 to get a good aperture. instead of the expected: PCI: Using ACPI for IRQ routing agpgart: Detected AGP bridge 0 agpgart: Aperture from AGP @ e0000000 size 128 MB Kevin bisected it down to this change in tip/x86/gart: "x86: checking aperture size order". agp check is using request_mem_region(), and could fail if e820 is reserved... change it back to e820_any_mapped(). Reported-and-bisected-by: "Kevin Winchester" <kjwinchester@gmail.com> Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Tested-by: Kevin Winchester <kjwinchester@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -324,8 +324,8 @@ void __init early_gart_iommu_check(void)
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fix = 1;
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if (gart_fix_e820 && !fix && aper_enabled) {
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if (!e820_all_mapped(aper_base, aper_base + aper_size,
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E820_RESERVED)) {
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if (e820_any_mapped(aper_base, aper_base + aper_size,
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E820_RAM)) {
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/* reserve it, so we can reuse it in second kernel */
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printk(KERN_INFO "update e820 for GART\n");
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add_memory_region(aper_base, aper_size, E820_RESERVED);
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