On Fri, 2018-08-17 at 07:30:39 UTC, Benjamin Herrenschmidt wrote: > The generic code is race when multiple children of a PCI bridge try to > enable it simultaneously. > > This leads to drivers trying to access a device through a not-yet-enabled > bridge, and this EEH errors under various circumstances when using parallel > driver probing. > > There is work going on to fix that properly in the PCI core but it will > take some time. > > x86 gets away with it because (outside of hotplug), the BIOS enables all > the bridges at boot time. > > This patch does the same thing on powernv by enabling all bridges that > have child devices at boot time, thus avoiding subsequent races. It's suitable > for backporting to stable and distros, while the proper PCI fix will probably > be significantly more invasive. > > Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org> > CC: sta...@vger.kernel.org
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/db2173198b9513f7add8009f225afa cheers
