Commit bcdde7e made __sysfs_remove_dir() recursive and introduced a BUG_ON
during PHB removal while attempting to delete the power managment attribute
group of the bus. This is a result of tearing the bridge and bus devices down
out of order in remove_phb_dynamic. Since, the the bus resides below the bridge
in the sysfs device tree it should be torn down first.
This patch simply moves the device_unregister call for the PHB bridge device
after the device_unregister call for the PHB bus.
Fixes: bcdde7e221a8 ("sysfs: make __sysfs_remove_dir() recursive")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Tyrel Datwyler <tyreld@xxxxxxxxxxxxxxxxxx>
---
v2:
- Included stable kernel list on Cc per comment by mpe
arch/powerpc/platforms/pseries/pci_dlpar.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/pci_dlpar.c b/arch/powerpc/platforms/pseries/pci_dlpar.c
index 203cbf0..89e2381 100644
--- a/arch/powerpc/platforms/pseries/pci_dlpar.c
+++ b/arch/powerpc/platforms/pseries/pci_dlpar.c
@@ -118,10 +118,10 @@ int remove_phb_dynamic(struct pci_controller *phb)
}
}
- /* Unregister the bridge device from sysfs and remove the PCI bus */
- device_unregister(b->bridge);
+ /* Remove the PCI bus and unregister the bridge device from sysfs */
phb->bus = NULL;
pci_remove_bus(b);
+ device_unregister(b->bridge);
/* Now release the IO resource */
if (res->flags & IORESOURCE_IO)
--
1.7.12.4
--
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