Messages in this thread | | | Date | Wed, 30 Oct 2013 23:48:24 -0700 | Subject | Re: [3.11.4] Thunderbolt/PCI unplug oops in pci_pme_list_scan | From | Yinghai Lu <> |
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On Wed, Oct 30, 2013 at 12:57 AM, Yijing Wang <wangyijing@huawei.com> wrote: >>>> Bisection points to 928bea964827d7824b548c1f8e06eccbbc4d0d7d . >>> >>> This is "PCI: Delay enabling bridges until they're needed" by Yinghai. >> >> that double disabling should be addressed by: >> >> https://lkml.org/lkml/2013/4/25/608 >> >> [PATCH] PCI: Remove duplicate pci_disable_device for pcie port > > Hi Yinghai and Bjorn, > I found a related issue in the latest Bjorn/pci-next branch. > > Now if we remove the pcie port device in the system, there is a warning occured. > It seems introduced after commit 928bea9 "PCI: Delay enabling bridges until they're needed". > > [ 2124.129478] ------------[ cut here ]------------ > [ 2124.129490] WARNING: CPU: 3 PID: 7 at drivers/pci/pci.c:1424 pci_disable_device+0x90/0xa0() > [ 2124.129492] Device pcieport > [ 2124.129492] disabling already-disabled device
yes. that is pcie port driver problem.
| 928bea delay bridge enabling, and it's pci_is_enabled checking will prevent | pci bridge get enabled second time, so enable_cnt will be only 1. instead of | 2. if we enable bridge at first and then pcie port driver.
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