Messages in this thread Patch in this message | | | Date | Mon, 12 Apr 2010 12:34:49 -0700 | From | Yinghai <> | Subject | Re: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as x86_32 |
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On 04/12/2010 11:54 AM, Andy Isaacson wrote: > On Fri, Apr 09, 2010 at 07:46:04PM -0700, Yinghai wrote: > [ 5.463672] ahci 0000:00:1f.2: PCI INT C -> GSI 20 (level, low) -> IRQ 20 > [ 5.470633] ahci 0000:00:1f.2: BAR 5: can't reserve [mem 0x000a0000-0x000a07ff] > [ 5.478257] ahci: probe of 0000:00:1f.2 failed with error -16
please check
[PATCH] x86,pci, acpi: Inherent BUSY flag when setup_resource for root bus
So make pci root resource from _CRS honor the range We reserve in e820 below 1M then will not assign them to unsigned pci BAR
-v2: let pci_bus_alloc_resource() honor IORESOURCE_BUSY driver can not use those range, so skip it
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
--- arch/x86/pci/acpi.c | 4 ++++ drivers/pci/bus.c | 4 ++++ 2 files changed, 8 insertions(+)
Index: linux-2.6/arch/x86/pci/acpi.c =================================================================== --- linux-2.6.orig/arch/x86/pci/acpi.c +++ linux-2.6/arch/x86/pci/acpi.c @@ -175,6 +175,10 @@ setup_resource(struct acpi_resource *acp "conflicts with %s %pR\n", res, conflict->name, conflict); } else { + /* In case it falls in big reserved region */ + if (res->parent->flags & IORESOURCE_BUSY) + res->flags |= IORESOURCE_BUSY; + pci_bus_add_resource(info->bus, res, 0); info->res_num++; if (addr.translation_offset) Index: linux-2.6/drivers/pci/bus.c =================================================================== --- linux-2.6.orig/drivers/pci/bus.c +++ linux-2.6/drivers/pci/bus.c @@ -103,6 +103,10 @@ pci_bus_alloc_resource(struct pci_bus *b if (!r) continue; + /* Driver can not reserve it later, so don't use it */ + if (r->flags & IORESOURCE_BUSY) + continue; + /* type_mask must match */ if ((res->flags ^ r->flags) & type_mask) continue;
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