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

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?

Please open a bug at bugzilla.kernel.org to help us keep track of
this -- thanks!

I have committed it the url,
https://bugzilla.kernel.org/show_bug.cgi?id=40212

John
--
John W. Linville                Someday the world will need a hero, and you
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