Re: PROBLEM: 2.6.7 Linux Kernel Crash While Detecting PCI Devices

Greg KH
2004-08-11T21:30:39Z

On Tue, Aug 10, 2004 at 12:14:09PM -0600, John Riggs wrote:
> The problem appears to be coming from the following series of calls:
>
> returns EEXIST
> create_dir
> sysfs_create_dir
> create_dir
> kobject_add
> class_device_add
> class_device_register
> pci_alloc_child_bus
>
> This causes pci_bus* child->class_dev.kobj.dentry to be NULL, which is
> passed into class_device_create_file eventually becoming a NULL POINTER
> in the function sysfs_add_file. (The NULL variable in sysfs_add_file is
> now called dir.)
>
> I don't have much of an understanding of the kernel, but it appears to
> me that a PCI device is getting created twice. Does anybody have any
> pointers as to what might be going on, or can point me in the right
> direction to look?

Yes, that sounds like what is happening. Can you build a modular kernel
and load the drivers you need one by one until the error happens?

thanks,

greg k-h