> -----Original Message----- > From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of > Ruiyu Ni > Sent: Wednesday, December 12, 2018 11:10 PM > To: edk2-devel@lists.01.org > Cc: Wu, Hao A > Subject: [edk2] [PATCH] MdeModulePkg/PciBus: Fix system hang when no > PCI Option ROM exists > > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1394 > > When there is no PCI option ROM exists, today's logic still creates > virtual BAR for option ROM using Length = 0, Alignment = (-1). > It causes the final MEM32 alignment requirement is as big as > 0xFFFFFFFF_FFFFFFFF. > > The patch fixes this issue by only creating virtual BAR for option > ROM when there is PCI option ROM. > > Contributed-under: TianoCore Contribution Agreement 1.1 > Signed-off-by: Ruiyu Ni <ruiyu...@intel.com> > Cc: Chiu Chasel <chasel.c...@intel.com> > Cc: Hao A Wu <hao.a...@intel.com> > Cc: Jian J Wang <jian.j.w...@intel.com> > --- > MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c | 10 ++++++---- > 1 file changed, 6 insertions(+), 4 deletions(-) > > diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c > b/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c > index 7255bcfbbc..ee5c77147e 100644 > --- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c > +++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciLib.c > @@ -515,10 +515,12 @@ PciHostBridgeResourceAllocator ( > // All devices' Option ROM share the same MEM32 resource. > // > MaxOptionRomSize = GetMaxOptionRomSize (RootBridgeDev); > - RootBridgeDev->PciBar[0].BarType = PciBarTypeOpRom; > - RootBridgeDev->PciBar[0].Length = MaxOptionRomSize; > - RootBridgeDev->PciBar[0].Alignment = MaxOptionRomSize - 1; > - GetResourceFromDevice (RootBridgeDev, IoBridge, Mem32Bridge, > PMem32Bridge, Mem64Bridge, PMem64Bridge); > + if (MaxOptionRomSize != 0) { > + RootBridgeDev->PciBar[0].BarType = PciBarTypeOpRom; > + RootBridgeDev->PciBar[0].Length = MaxOptionRomSize; > + RootBridgeDev->PciBar[0].Alignment = MaxOptionRomSize - 1; > + GetResourceFromDevice (RootBridgeDev, IoBridge, Mem32Bridge, > PMem32Bridge, Mem64Bridge, PMem64Bridge); > + }
Reviewed-by: Hao Wu <hao.a...@intel.com> Best Regards, Hao Wu > > // > // Create resourcemap by going through all the devices subject to this > root bridge > -- > 2.16.1.windows.1 > > _______________________________________________ > edk2-devel mailing list > edk2-devel@lists.01.org > https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
