Re: PCI driver module unload race?

[Russell King]

On Sat, Mar 08, 2003 at 11:12:37AM -0800, Greg KH wrote:
> On Sat, Mar 08, 2003 at 10:47:49AM +0000, Russell King wrote:
> > Hi,
> > 
> > What prevents the following scenario from happening?  It's purely
> > theoretical - I haven't seen this occuring.
> > 
> > - Load PCI driver.
> > 
> > - PCI driver registers using pci_module_init(), and adds itself to sysfs.
> > 
> > - Hot-plugin a PCI device which uses this driver.  sysfs matches the PCI
> >   driver, and calls the PCI drivers probe function.
> 
> Ugh, yes you are correct, I can't believe I missed this before.
> 
> How does this patch look?

Hrm, I'm wondering whether this should be part of the device model
infrastructure.  After all, surely every subsystems device driver
which could be a module would need this to prevent unload races?

-- 
Russell King ([e-mail])                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html