74 lines
2.8 KiB
Diff
74 lines
2.8 KiB
Diff
From: Ruiyu Ni <ruiyu.ni@intel.com>
|
|
Subject: [PATCH] MdeModulePkg/PciBus: Fix bug that PCI BUS claims too much resource
|
|
Date: Thu, 16 Nov 2017 18:15:14 +0100
|
|
|
|
The bug was caused by 728d74973c9262b6c7b7ef4be213223d55affec3
|
|
"MdeModulePkg/PciBus: Count multiple hotplug resource paddings".
|
|
|
|
The patch firstly updated the Bridge->Alignment to the maximum
|
|
alignment of all devices under the bridge, then aligned the
|
|
Bridge->Length to Bridge->Alignment.
|
|
It caused too much resources were claimed.
|
|
|
|
The new patch firstly aligns Bridge->Length to Bridge->Alignment,
|
|
then updates the Bridge->Alignment to the maximum alignment of all
|
|
devices under the bridge.
|
|
Because the step to update the Bridge->Alignment is to make sure
|
|
the resource allocated to the bus under the Bridge meets all
|
|
devices alignment. But the Bridge->Length doesn't have to align
|
|
to the maximum alignment.
|
|
|
|
Contributed-under: TianoCore Contribution Agreement 1.1
|
|
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
|
|
Reviewed-by: Eric Dong <eric.dong@intel.com>
|
|
(cherry picked from commit 6e3287442774c1a4bc83f127694700eeb07c18dc)
|
|
---
|
|
MdeModulePkg/Bus/Pci/PciBusDxe/PciResourceSupport.c | 24 ++++++++++----------
|
|
1 file changed, 12 insertions(+), 12 deletions(-)
|
|
|
|
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciResourceSupport.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciResourceSupport.c
|
|
index 8dbe9a00380f..2f713fcee95e 100644
|
|
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciResourceSupport.c
|
|
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciResourceSupport.c
|
|
@@ -389,18 +389,7 @@ CalculateResourceAperture (
|
|
}
|
|
|
|
//
|
|
- // Adjust the bridge's alignment to the MAX (first) alignment of all children.
|
|
- //
|
|
- CurrentLink = Bridge->ChildList.ForwardLink;
|
|
- if (CurrentLink != &Bridge->ChildList) {
|
|
- Node = RESOURCE_NODE_FROM_LINK (CurrentLink);
|
|
- if (Node->Alignment > Bridge->Alignment) {
|
|
- Bridge->Alignment = Node->Alignment;
|
|
- }
|
|
- }
|
|
-
|
|
- //
|
|
- // At last, adjust the aperture with the bridge's alignment
|
|
+ // Adjust the aperture with the bridge's alignment
|
|
//
|
|
Aperture[PciResUsageTypical] = ALIGN_VALUE (Aperture[PciResUsageTypical], Bridge->Alignment + 1);
|
|
Aperture[PciResUsagePadding] = ALIGN_VALUE (Aperture[PciResUsagePadding], Bridge->Alignment + 1);
|
|
@@ -410,6 +399,17 @@ CalculateResourceAperture (
|
|
// Use the larger one between the padding resource and actual occupied resource.
|
|
//
|
|
Bridge->Length = MAX (Aperture[PciResUsageTypical], Aperture[PciResUsagePadding]);
|
|
+
|
|
+ //
|
|
+ // Adjust the bridge's alignment to the MAX (first) alignment of all children.
|
|
+ //
|
|
+ CurrentLink = Bridge->ChildList.ForwardLink;
|
|
+ if (CurrentLink != &Bridge->ChildList) {
|
|
+ Node = RESOURCE_NODE_FROM_LINK (CurrentLink);
|
|
+ if (Node->Alignment > Bridge->Alignment) {
|
|
+ Bridge->Alignment = Node->Alignment;
|
|
+ }
|
|
+ }
|
|
}
|
|
|
|
/**
|
|
--
|
|
2.14.1.3.gb7cf6e02401b
|
|
|