On Tue, 1 Jan 2008, Greg KH wrote:

> On Mon, Dec 31, 2007 at 11:26:43AM -0800, Greg KH wrote:
> > On Mon, Dec 31, 2007 at 12:49:52PM -0500, Alan Stern wrote:
> > > On Sun, 30 Dec 2007, Greg KH wrote:
> > > 
> > > > > It looks like Greg misused the debugfs API -- which is ironic, because
> > > > > he wrote debugfs in the first place!  :-)

> Ok, no, I didn't write that patch, I'm getting very confused here.
> 
> In 2.6.24-rc6 there is no usage of debugfs in the ohci driver.
> 
> In the -mm tree there is a patch, from Tony Jones, that moves some debug
> code out of sysfs and into debugfs where it belongs.  It does it for
> both the ehci and ohci USB host controller drivers, and this is the code
> that is incorrect if CONFIG_DEBUGFS is not enabled.

My mistake; I got the impression you had written that new code rather
than Tony.  BTW, I don't recall ever seeing Tony's patch announced on
linux-usb or linux-usb-devel.  Did I simply miss it?

> So, for the 2.6.24 release, nothing needs to be changed, all is good,
> and there is no regression.
> 
> Right?  Or am I still confused about this whole thing?

Correct.  The problem exists only in -mm and your development tree.

> I will go fix up Tony's patches in the -mm tree that do not handle the
> error return values from debugfs properly, but that is not such a rush,
> as Tony is on vacation for a few weeks, and those patches are going to
> be going in only after 2.6.24 is out.

The fix I posted earlier in this thread should simply be merged into 
Tony's patches.

Alan Stern

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