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When we unload the pci-hyperv host controller driver, the host does not
send us a PCI_EJECT message.
In this case we also need to make sure the sysfs PCI slot directory is
removed, otherwise a command on a slot file eg:
"cat /sys/bus/pci/slots/2/address"
will trigger a
"BUG: unable to handle kernel paging request"
and, if we unload/reload the driver several times we would end up with
stale slot entries in PCI slot directories in /sys/bus/pci/slots/
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
Add the missing code to remove the PCI slot and fix the current
behaviour.
Fixes: a15f2c08c708 ("PCI: hv: support reporting serial number as slot information")
Signed-off-by: Dexuan Cui <decui@microsoft.com>
[lorenzo.pieralisi@arm.com: reformatted the log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Cc: stable@vger.kernel.org
15becc2b56