Re: oops when removing sbp2 module

[Patrick Mansfield]

On Mon, Oct 06, 2003 at 01:08:27PM +1000, Paul Mackerras wrote:

> That fixes it, it no longer oopses on removing sbp2.  As before I get
> a message saying "Device 'fw-host0' does not have a release()
> function, it is broken and must be fixed."  I assume that is a problem
> with the sbp2 module.
> 
> The code in the patch looks a little worrying to me, though.  Is there
> some lock we have taken to ensure that no other process could be
> modifying sdev->access_count at the same time?  Also, what is to stop
> some other process from noticing that sdev->access_count is 0 and
> calling device_del(&sdev->sdev_gendev) ?

Yes, it's a known problem, there is also a comment in the code, Christoph
was working on it.

-- Patrick Mansfield
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