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PCI: use ACPI _CRS data by default

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At this point, it seems to solve more problems than it causes, so let's try using it by default.  It's an easy revert if it ends up causing trouble.

Reviewed-by: Yinghai Lu <yhlu.kernel@gmail.com>
Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Jesse Barnes 2009-06-11 10:58:28 -07:00
parent 3b073eda95
commit 9e9f46c44e
5 changed files with 6 additions and 6 deletions
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2
Documentation/kernel-parameters.txt
View File

@ -1787,7 +1787,7 @@ and is between 256 and 4096 characters. It is defined in the file
IRQ routing is enabled.
noacpi [X86] Do not use ACPI for IRQ routing
or for PCI scanning.
use_crs [X86] Use _CRS for PCI resource
nocrs [X86] Don't use _CRS for PCI resource
allocation.
routeirq Do IRQ routing for all PCI devices.
This is normally done in pci_enable_device(),

2
arch/x86/include/asm/pci_x86.h
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@ -25,7 +25,7 @@
#define PCI_BIOS_IRQ_SCAN 0x2000
#define PCI_ASSIGN_ALL_BUSSES 0x4000
#define PCI_CAN_SKIP_ISA_ALIGN 0x8000
#define PCI_USE__CRS 0x10000
#define PCI_NO_ROOT_CRS 0x10000
#define PCI_CHECK_ENABLE_AMD_MMCONF 0x20000
#define PCI_HAS_IO_ECS 0x40000
#define PCI_NOASSIGN_ROMS 0x80000

2
arch/x86/pci/acpi.c
View File

@ -217,7 +217,7 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int do
#endif
}
if (bus && (pci_probe & PCI_USE__CRS))
if (bus && !(pci_probe & PCI_NO_ROOT_CRS))
get_current_resources(device, busnum, domain, bus);
return bus;
}

2
arch/x86/pci/amd_bus.c
View File

@ -101,7 +101,7 @@ void x86_pci_root_bus_res_quirks(struct pci_bus *b)
struct pci_root_info *info;
/* don't go for it if _CRS is used */
if (pci_probe & PCI_USE__CRS)
if (!(pci_probe & PCI_NO_ROOT_CRS))
return;
/* if only one root bus, don't need to anything */

4
arch/x86/pci/common.c
View File

@ -515,8 +515,8 @@ char * __devinit pcibios_setup(char *str)
} else if (!strcmp(str, "assign-busses")) {
pci_probe |= PCI_ASSIGN_ALL_BUSSES;
return NULL;
} else if (!strcmp(str, "use_crs")) {
pci_probe |= PCI_USE__CRS;
} else if (!strcmp(str, "nocrs")) {
pci_probe |= PCI_NO_ROOT_CRS;
return NULL;
} else if (!strcmp(str, "earlydump")) {
pci_early_dump_regs = 1;