On 07/28/2011 02:06 AM, hubert Liao wrote:

2011/7/27 John W. Linville[off-list ref]:

quoted

On Wed, Jul 27, 2011 at 05:20:15PM +0800, hubert Liao wrote:

quoted

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