# git rev-parse -q --verify b87b9cf4935325c98522823caeddd333022a1c62^{commit}
b87b9cf4935325c98522823caeddd333022a1c62
already have revision, skipping fetch
# git checkout -q -f -B kisskb b87b9cf4935325c98522823caeddd333022a1c62
# git clean -qxdf
# < git log -1
# commit b87b9cf4935325c98522823caeddd333022a1c62
# Author: Sam Bobroff <sbobroff@linux.ibm.com>
# Date:   Mon Jul 30 11:59:14 2018 +1000
# 
#     powerpc/pseries: fix EEH recovery of some IOV devices
#     
#     EEH recovery currently fails on pSeries for some IOV capable PCI
#     devices, if CONFIG_PCI_IOV is on and the hypervisor doesn't provide
#     certain device tree properties for the device. (Found on an IOV
#     capable device using the ipr driver.)
#     
#     Recovery fails in pci_enable_resources() at the check on r->parent,
#     because r->flags is set and r->parent is not.  This state is due to
#     sriov_init() setting the start, end and flags members of the IOV BARs
#     but the parent not being set later in
#     pseries_pci_fixup_iov_resources(), because the
#     "ibm,open-sriov-vf-bar-info" property is missing.
#     
#     Correct this by zeroing the resource flags for IOV BARs when they
#     can't be configured (this is the same method used by sriov_init() and
#     __pci_read_base()).
#     
#     VFs cleared this way can't be enabled later, because that requires
#     another device tree property, "ibm,number-of-configurable-vfs" as well
#     as support for the RTAS function "ibm_map_pes". These are all part of
#     hypervisor support for IOV and it seems unlikely that a hypervisor
#     would ever partially, but not fully, support it. (None are currently
#     provided by QEMU/KVM.)
#     
#     Signed-off-by: Sam Bobroff <sbobroff@linux.ibm.com>
#     Reviewed-by: Bryant G. Ly <bryantly@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < git log --format=%s --max-count=1 b87b9cf4935325c98522823caeddd333022a1c62
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/mpe-quick_skiroot_defconfig_ppc64le-8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  skiroot_defconfig
# make -s -j 120 ARCH=powerpc O=/kisskb/build/mpe-quick_skiroot_defconfig_ppc64le-8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter.
/kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter.
WARNING: modpost: Found 3 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
Completed OK
# rm -rf /kisskb/build/mpe-quick_skiroot_defconfig_ppc64le-8
# Build took: 0:00:37.765880