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@xxxxxxxxxx>
---
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;
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
