Messages in this thread | | | From | Michael Kelley <> | Subject | RE: [PATCH 2/3] PCI: hv: Add hv_pci_remove_slots() when we unload the driver | Date | Wed, 20 Mar 2019 21:38:55 +0000 |
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From: Dexuan Cui <decui@microsoft.com> Sent: Monday, March 4, 2019 1:35 PM > > 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" (I noticed the issue when > systemd-dev crashed for me when I unloaded the driver). 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. > > Fixes: a15f2c08c708 ("PCI: hv: support reporting serial number as slot information") > Signed-off-by: Dexuan Cui <decui@microsoft.com> > Acked-by: Stephen Hemminger <sthemmin@microsoft.com> > Cc: stable@vger.kernel.org
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
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