Subject: Re: [PATCH] powerpc/pci: reorder pci bus/bridge unregistration during PHB removal

From: Michael Ellerman <[email-masked]>
Date: Tue, 29 Jul 2014 11:44:16 +1000

On Mon, 2014-07-28 at 20:48 -0400, Tyrel Datwyler wrote:
> 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.
> 
> Signed-off-by: Tyrel Datwyler <[email-masked]>

That commit went into 3.13, so shouldn't this be CC to stable?

And also:

  Fixes: bcdde7e221a8 ("sysfs: make __sysfs_remove_dir() recursive")

cheers