On Thu, 7 Feb 2019 20:36:32 +0000
Dexuan Cui <[email protected]> wrote:
> When we unload pci-hyperv, the host doesn't send us a PCI_EJECT message.
> In this case we also need to make sure the sysfs pci slot directory
> is removed, otherwise "cat /sys/bus/pci/slots/2/address" will trigger
> "BUG: unable to handle kernel paging request". And, if we unload/reload
> the driver several times, we'll have multiple pci slot directories in
> /sys/bus/pci/slots/ like this:
>
> root@localhost:~# ls -rtl /sys/bus/pci/slots/
> total 0
> drwxr-xr-x 2 root root 0 Feb 7 10:49 2
> drwxr-xr-x 2 root root 0 Feb 7 10:49 2-1
> drwxr-xr-x 2 root root 0 Feb 7 10:51 2-2
>
> The patch adds the missing code, and in hv_eject_device_work() it also
> moves pci_destroy_slot() to an earlier place where we hold the pci lock.
>
> Fixes: a15f2c08c708 ("PCI: hv: support reporting serial number as slot
> information")
> Signed-off-by: Dexuan Cui <[email protected]>
> Cc: [email protected]
> Cc: Stephen Hemminger <[email protected]>
Acked-by: Stephen Hemminger <[email protected]>
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