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15160716ee
IO resource and ioremap debugging uncovered this ioremap() done by drivers/pci/hotplug/ibmphp_ebda.c: initcall pci_hotplug_init+0x0/0x41 returned 0 after 3 msecs calling ibmphp_init+0x0/0x360 @ 1 ibmphpd: IBM Hot Plug PCI Controller Driver version: 0.6 resource map sanity check conflict: 0x9f800 0xaf5e7 0x9f800 0x9ffff reserved ------------[ cut here ]------------ WARNING: at arch/x86/mm/ioremap.c:175 __ioremap_caller+0x5c/0x226() Pid: 1, comm: swapper Not tainted 2.6.27-rc7-tip-00914-g347b10f-dirty #36038 [<c013a72d>] warn_on_slowpath+0x41/0x68 [<c0156f00>] ? __lock_acquire+0x9ba/0xa7f [<c012158c>] ? do_flush_tlb_all+0x0/0x59 [<c015ac31>] ? smp_call_function_mask+0x74/0x17d [<c012158c>] ? do_flush_tlb_all+0x0/0x59 [<c013b228>] ? printk+0x1a/0x1c [<c013f302>] ? iomem_map_sanity_check+0x82/0x8c [<c0a773e8>] ? _read_unlock+0x22/0x25 [<c013f302>] ? iomem_map_sanity_check+0x82/0x8c [<c0154e17>] ? trace_hardirqs_off+0xb/0xd [<c0127731>] __ioremap_caller+0x5c/0x226 [<c0156158>] ? trace_hardirqs_on+0xb/0xd [<c012767d>] ? iounmap+0x9d/0xa5 [<c01279dd>] ioremap_nocache+0x15/0x17 [<c0403c42>] ? ioremap+0xd/0xf [<c0403c42>] ioremap+0xd/0xf [<c0f1928f>] ibmphp_access_ebda+0x60/0xa0e [<c0f17f64>] ibmphp_init+0xb5/0x360 [<c0101057>] do_one_initcall+0x57/0x138 [<c0f17eaf>] ? ibmphp_init+0x0/0x360 [<c0156158>] ? trace_hardirqs_on+0xb/0xd [<c0148d75>] ? __queue_work+0x2b/0x30 [<c0f17eaf>] ? ibmphp_init+0x0/0x360 [<c0f015a0>] kernel_init+0x17b/0x1e2 [<c0f01425>] ? kernel_init+0x0/0x1e2 [<c01178b3>] kernel_thread_helper+0x7/0x10 ======================= ---[ end trace a7919e7f17c0a725 ]--- initcall ibmphp_init+0x0/0x360 returned -19 after 144 msecs calling zt5550_init+0x0/0x6a @ 1 the problem is this code: io_mem = ioremap (ebda_seg<<4, 65000); it assumes that the EBDA is 65000 bytes. But BIOS EBDA pointers are at most 1K large. _if_ the Rio code truly extends upon the customary EBDA size it needs to iounmap() this memory and ioremap() it larger, once it knows it from the generic descriptors that a Rio system is around. Signed-off-by: Ingo Molnar <mingo@elte.hu> |
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| .. | ||
| hotplug | ||
| pcie | ||
| .gitignore | ||
| access.c | ||
| bus.c | ||
| dmar.c | ||
| hotplug-pci.c | ||
| hotplug.c | ||
| htirq.c | ||
| intel-iommu.c | ||
| intel-iommu.h | ||
| iova.c | ||
| iova.h | ||
| Kconfig | ||
| Makefile | ||
| msi.c | ||
| msi.h | ||
| pci-acpi.c | ||
| pci-driver.c | ||
| pci-sysfs.c | ||
| pci.c | ||
| pci.h | ||
| probe.c | ||
| proc.c | ||
| quirks.c | ||
| remove.c | ||
| rom.c | ||
| search.c | ||
| setup-bus.c | ||
| setup-irq.c | ||
| setup-res.c | ||
| slot.c | ||
| syscall.c | ||