Re: [patch]usbled disconnect read race

Am Sonntag 28 Oktober 2007 schrieben Sie:
> On Fri, 26 Oct 2007, Oliver Neukum wrote:
> 
> > Hi,
> > 
> > usbled has a race where show methods for attributes in sysfs can
> > follow a NULL pointer during disconnect. The correct ordering fixes
> > it.
> 
> Your comment talks about show methods for attributes, but the patch 
> affects lcd_open() and lcd_disconnect().  What's going on?

I made a typo including the wrong patch.

> Furthermore, it's been true for a while that unregistering an attribute 
> was synchronized with calls to the show and store methods.  There 
> shouldn't be any races between show and disconnect.

All is well, if disconnect() unregisters before it bends pointers needed
for reading attributes to NULL.

	Regards
		Oliver




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