From mboxrd@z Thu Jan 1 00:00:00 1970 From: Larry Finger Subject: Re: Oops when insmod rtl8192ce Date: Wed, 27 Jul 2011 09:37:13 -0500 Message-ID: <4E302299.2070309@lwfinger.net> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Chaoming Li , "John W. Linville" , linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: hubert Liao Return-path: In-Reply-To: Sender: linux-wireless-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org On 07/27/2011 04:26 AM, 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? > ---- > [ 148.186632] Unable to handle kernel NULL pointer dereference at > virtual address 00000020 As John Linville suggested, please open a bugzilla report. I would also like some additional information. What kernel are you using? In addition, please post the 'lspci -nnk' information for your card. I also think that pdev->bus should have been setup before the initialization code in rtl8192ce was called. I have not tested the driver on other than x86 and x86_64 architectures because of hardware availability, thus ARM may expose some problems. Is this soc little-endian? Thanks, Larry -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html