On 02/22/2017 12:07 AM, Alex Williamson wrote: > On Tue, 21 Feb 2017 18:21:53 +0800 > Cao jin <caoj.f...@cn.fujitsu.com> wrote: > >> Hi, >> >> First, sorry for such a long time delay on the AER job. I was on 12 days >> holiday, and start to work on the patch 2 weeks ago, because I use a >> newer version kernel(4.10 rc8) to start off the work, several tiny >> problems slow me. >> >> Now I meet a confusing issue on aer_inject module. When I use aer_inject >> command before, it says: >> >> Error: Failed to write, No such device >> >> then in dmesg, it says: >> >> pcieport 0000:00:09.0: aer_inject: AER device not found >> >> and then I add some debug line in find_aer_device_iter() to check >> device->bus-name, find that it is "pci", so that is why I can't inject, >> it should have been "pci_express". But everything is same as before >> except a newer host kernel. >> >> I still don't have a clue on this problem for almost 2 days, could you help? > > If it only happens with a new host kernel, I would suggest finding a > kernel where it works and bisecting between working and non-working > kernels to find the commit that introduced the change. You may have > found a regression in the kernel that should be reported upstream. > Thanks, > > Alex >
Finally find the reason, I missed a kernel command line parameter pcie_ports=native. Sorry for the noise. It seems when make install the kernel, it will blow away the content of old grub.cfg, so that I cannot check the parameters used in previous kernel. -- Sincerely, Cao jin
