Revision: 18473
http://sourceforge.net/p/edk2/code/18473
Author: niruiyu
Date: 2015-09-15 08:38:16 +0000 (Tue, 15 Sep 2015)
Log Message:
-----------
MdeModulePkg: Enhance PCI capability looking up logic to avoid hang
Certain PCI device may have capability pointing to itself.
Update LocateCapabilityRegBlock() to break when detecting such loop.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <[email protected]>
Reviewed-by: Feng Tian <[email protected]>
Modified Paths:
--------------
trunk/edk2/MdeModulePkg/Bus/Pci/PciBusDxe/PciCommand.c
Modified: trunk/edk2/MdeModulePkg/Bus/Pci/PciBusDxe/PciCommand.c
===================================================================
--- trunk/edk2/MdeModulePkg/Bus/Pci/PciBusDxe/PciCommand.c 2015-09-15
08:35:19 UTC (rev 18472)
+++ trunk/edk2/MdeModulePkg/Bus/Pci/PciBusDxe/PciCommand.c 2015-09-15
08:38:16 UTC (rev 18473)
@@ -173,6 +173,14 @@
return EFI_SUCCESS;
}
+ //
+ // Certain PCI device may incorrectly have capability pointing to itself,
+ // break to avoid dead loop.
+ //
+ if (CapabilityPtr == (UINT8) (CapabilityEntry >> 8)) {
+ break;
+ }
+
CapabilityPtr = (UINT8) (CapabilityEntry >> 8);
}
------------------------------------------------------------------------------
_______________________________________________
edk2-commits mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/edk2-commits
