A USB4 or TBT bridge can be plugged or unplugged on USB4 port. The actions
require PciHotPlugRequestNotify to add a root bridge or remove a root bridge
completely.
In the plug-unplug-plug scenerio, PciHotPlugRequestNotify will return with
no-action on second plug because bridge tree shows configured.
Destroy Pci Device Tree in function PciHotPlugRequestNotify for unplug event to
fix this issue.
Cc: Feng Ding <feng1.d...@amd.com>
Cc: Jiangang He <jiangang...@amd.com>
Signed-off-by: Neo Hsueh <hong-chih.hs...@amd.com>
---
MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
index 3f8c6e6da7..2b7af60e0a 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumerator.c
@@ -2103,6 +2103,8 @@ PciHotPlugRequestNotify (
}
}
+ DestroyPciDeviceTree (Bridge);
+
//
// End for
//
--
2.40.0.windows.1
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