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| author | Tyrel Datwyler <tyreld@linux.vnet.ibm.com> | 2014-07-29 13:48:13 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-05 16:34:15 -0700 |
| commit | 51d79fc2bc76246b3f098480404837bfdf1c76eb (patch) | |
| tree | db420c06ddd8d7461e80ed420efea0bc6b7f4935 /arch/powerpc | |
| parent | bc9043277554c6cb45d78c7fc4f6ee03787b2b75 (diff) | |
| download | lwn-51d79fc2bc76246b3f098480404837bfdf1c76eb.tar.gz lwn-51d79fc2bc76246b3f098480404837bfdf1c76eb.zip | |
powerpc/pci: Reorder pci bus/bridge unregistration during PHB removal
commit 7340056567e32b2c9d3554eb146e1977c93da116 upstream.
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")
Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/pseries/pci_dlpar.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/pseries/pci_dlpar.c b/arch/powerpc/platforms/pseries/pci_dlpar.c index efe61374f6ea..e68922b0d4f5 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) |