H W Kirkwood

Re: Oops when insmod rtl8192ce (Linux Wireless)

2011/7/28 Larry Finger <Larry.Finger@xxxxxxxxxxxx>: > 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. > I have added the full dmesg output on bugzilla. thanks.

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