Found with pm/linux-next, network device in QEMU/KVM guest does not
work anymore.
Bisected to commit c13085e5
ACPICA: Resource Mgr: Prevent infinite loops in resource walks
That commit will check acpi_resource length strictly.
it cause acpi_set_current_resources return failure and irq for pci device
is not set properly.
Set length for all those TYPE_END_TAG acpi_resources.
Bisected-by: Yinghai Lu <ying...@kernel.org>
Signed-off-by: Yinghai Lu <ying...@kernel.org>
Cc: Mattia Dongili <malat...@linux.it>
Cc: Matthew Garrett <matthew.garr...@nebula.com>
Cc: Adam Belay <abe...@mit.edu>
Cc: Bjorn Helgaas <bhelg...@google.com>
Cc: platform-driver-...@vger.kernel.org
---
drivers/acpi/pci_link.c | 1 +
drivers/platform/x86/sony-laptop.c | 3 ++-
drivers/pnp/pnpacpi/rsparser.c | 1 +
3 files changed, 4 insertions(+), 1 deletion(-)
Index: linux-2.6/drivers/acpi/pci_link.c
===================================================================
--- linux-2.6.orig/drivers/acpi/pci_link.c
+++ linux-2.6/drivers/acpi/pci_link.c
@@ -354,6 +354,7 @@ static int acpi_pci_link_set(struct acpi
}
resource->end.type = ACPI_RESOURCE_TYPE_END_TAG;
+ resource->end.length = sizeof(struct acpi_resource);
/* Attempt to set the resource */
status = acpi_set_current_resources(link->device->handle, &buffer);
Index: linux-2.6/drivers/platform/x86/sony-laptop.c
===================================================================
--- linux-2.6.orig/drivers/platform/x86/sony-laptop.c
+++ linux-2.6/drivers/platform/x86/sony-laptop.c
@@ -4121,7 +4121,7 @@ static int sony_pic_enable(struct acpi_d
resource->res3.data.irq.sharable = ACPI_SHARED;
resource->res4.type = ACPI_RESOURCE_TYPE_END_TAG;
-
+ resource->res4.length = sizeof(struct acpi_resource);
}
/* setup Type 2/3 resources */
else {
@@ -4140,6 +4140,7 @@ static int sony_pic_enable(struct acpi_d
resource->res2.data.irq.sharable = ACPI_SHARED;
resource->res3.type = ACPI_RESOURCE_TYPE_END_TAG;
+ resource->res3.length = sizeof(struct acpi_resource);
}
/* Attempt to set the resource */
Index: linux-2.6/drivers/pnp/pnpacpi/rsparser.c
===================================================================
--- linux-2.6.orig/drivers/pnp/pnpacpi/rsparser.c
+++ linux-2.6/drivers/pnp/pnpacpi/rsparser.c
@@ -634,6 +634,7 @@ int pnpacpi_build_resource_template(stru
}
/* resource will pointer the end resource now */
resource->type = ACPI_RESOURCE_TYPE_END_TAG;
+ resource->length = sizeof(struct acpi_resource);
return 0;
}
--
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