Re: [Intel-wired-lan] [PATCH v2] igc: fix page fault when thunderbolt is unplugged

[Fuxbrumer, Dvora]

On 7/13/2021 16:00, Aaron Ma wrote:
> After unplug thunerbolt dock with i225, pciehp interrupt is triggered,
> remove call will read/write mmio address which is already disconnected,
> then cause page fault and make system hang.
>
> Check PCI state to remove device safely.
>
> Trace:
> BUG: unable to handle page fault for address: 000000000000b604
> Oops: 0000 [#1] SMP NOPTI
> RIP: 0010:igc_rd32+0x1c/0x90 [igc]
> Call Trace:
> igc_ptp_suspend+0x6c/0xa0 [igc]
> igc_ptp_stop+0x12/0x50 [igc]
> igc_remove+0x7f/0x1c0 [igc]
> pci_device_remove+0x3e/0xb0
> __device_release_driver+0x181/0x240
>
> Signed-off-by: Aaron Ma <aaron.ma@xxxxxxxxxxxxx>
> ---
>   drivers/net/ethernet/intel/igc/igc_main.c | 32 ++++++++++++++---------
>   drivers/net/ethernet/intel/igc/igc_ptp.c  |  3 ++-
>   2 files changed, 21 insertions(+), 14 deletions(-)
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@xxxxxxxxxxxxxxx>