# git rev-parse -q --verify 942523fd67563ea677cc03fc97635893d4350749^{commit}
942523fd67563ea677cc03fc97635893d4350749
already have revision, skipping fetch
# git checkout -q -f -B kisskb 942523fd67563ea677cc03fc97635893d4350749
# git clean -qxdf
# < git log -1
# commit 942523fd67563ea677cc03fc97635893d4350749
# Author: Oliver O'Halloran <oohall@gmail.com>
# Date:   Wed Nov 13 20:40:35 2019 +1100
# 
#     powerpc/powernv: Disable native PCIe port management
#     
#     On PowerNV the PCIe topology is (currently) managed by the powernv
#     platform code in cooperation with firmware. The PCIe-native service
#     drivers bypass both and this can cause problems.
#     
#     Historically this hasn't been a big deal since the only port service
#     driver that saw much use was the AER driver. The AER driver relies on
#     a kernel service to report when errors occur rather than acting
#     autonomously so it's fairly easy to ignore. On PowerNV (and pseries)
#     AER events are handled through EEH, which ignores the AER service, so
#     it's never been an issue.
#     
#     Unfortunately, the hotplug port service driver (pciehp) does act
#     autonomously and conflicts with the platform specific hotplug
#     driver (pnv_php). The main issue is that pciehp claims the interrupt
#     associated with the PCIe capability which in turn prevents pnv_php
#     from claiming it.
#     
#     This results in hotplug events being handled by pciehp which does not
#     notify firmware when the PCIe topology changes, and does not
#     setup/teardown the arch specific PCI device structures (pci_dn) when
#     the topology changes. The end result is that hot-added devices cannot
#     be enabled and hot-removed devices may not be fully torn-down on
#     removal.
#     
#     We can fix these problems by setting the "pcie_ports_disabled" flag
#     during platform initialisation. The flag indicates the platform owns
#     the PCIe ports which stops the portbus driver from being registered.
#     
#     Fixes: 66725152fb9f ("PCI/hotplug: PowerPC PowerNV PCI hotplug driver")
#     Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20191113094035.22394-1-oohall@gmail.com
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 942523fd67563ea677cc03fc97635893d4350749
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_tqm8555_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  85xx/tqm8555_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_tqm8555_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
INFO: Uncompressed kernel (size 0x4ee988) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x500000)
INFO: Uncompressed kernel (size 0x4de260) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x500000)
Image Name:   Linux-5.4.0-rc2-g942523fd6756
Created:      Sat Nov 16 01:09:54 2019
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2556534 Bytes = 2496.62 KiB = 2.44 MiB
Load Address: 00500000
Entry Point:  00500314
Image Name:   Linux-5.4.0-rc2-g942523fd6756
Created:      Sat Nov 16 01:09:54 2019
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2526573 Bytes = 2467.36 KiB = 2.41 MiB
Load Address: 00000000
Entry Point:  00000000
Completed OK
# rm -rf /kisskb/build/powerpc-next_85xx_tqm8555_defconfig_powerpc-gcc5
# Build took: 0:00:43.199378