Re: Oops when insmod rtl8192ce

[Larry Finger]

On 07/28/2011 02:06 AM, hubert Liao wrote:
> 2011/7/27 John W. Linville<linville@xxxxxxxxxxxxx>:
> > On Wed, Jul 27, 2011 at 05:20:15PM +0800, hubert Liao wrote:
> > > Hi,
> > >
> > > We got an oops when insmod rtl8192ce module (the board is an ARM soc),
> > > accroding the oops message, find it's because in rtl_pci_probe() called
> > > _rtl_pci_find_adapter(),
> > > in this funcation, the  pdev->bus->self is a NULL pointer .
> > >
> > > static boot _rtl_pci_find_adapter(strcut pci_dev *dev,
> > >                struct ieee80211_hw *hw)
> > > {
> > >
> > > struct pci_dev *bridge_pdev = pdev->bus->self;   //line 1601
> > > ...
> > >
> > > pcipriv->ndis_adapter.pcibridge_vendorid = bridge_pdev->vendor;<-- [oops
> > > here] line 1700
> > >
> > > ...
> > > }
> > >
> > > here, I just want to know why the bus->self  is NULL?
> >
> > pdev is coming straight from what is passed to the PCI probe routine.
> > It seems like pdev->bus->self should already be set before that
> > happens.
> Yes, I think it should be initialized when added the pci bus bridge,
> I have checked the mach-kirkwood(my board is arch/arm/mach-kirkwood)
> pcie related code, and I think when system initialized should call
> kirkwood_pcie_init() ->
>              kirkwood_pcie_scan_bus() ->
>                             pci_scan_bus() ->
>                                      pci_bus_add_devices()
> if the pci_bus->self  was initialized in pci_bus_add_devices()?
> Maybe the code is too complex for me ,  I really can not find where
> set the “->self" member?

I added a request to the bugzilla entry to post the full dmesg output there. 
Perhaps there is some clue in the bus setup.

Larry

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