[U-Boot] [PATCH v2] test: ums: Add sleep before unmount directory

[Lukasz Majewski]

On Wed, 12 Nov 2014 11:11:33 -0700
Stephen Warren <swarren at wwwdotorg.org> wrote:

> On 11/12/2014 09:45 AM, Wolfgang Denk wrote:
> > Dear Lukasz,
> >
> > In message <20141112152949.1fe6ce3c at amdc2363> you wrote:
> >>
> >>> But this is a bug.  Papering over is not a good idea.  It should
> >>> be analyzed, reported, and finally fixed.
> >>
> >> I've debugged the script with strace.
> >
> > Thanks a lot for that!
> >
> >> The problem is with umount() syscall:
> > ...
> >> I need to debug the syscall in the kernel.
> >
> > I have a gut feeling that this might be a problem somewhere with the
> > USB stuff that is involved here.  Maybe enabling some degug messages
> > for the USB subsystem gives some more information?
> 
> If this really is related to USB only, it may be worth asking on the 
> linux-usb mailing list to see if anyone already unerstands the issue.

Frankly speaking, I'm personally curious why such things happen. I may
look into the issue in my "spare :-)" time.

In spite of this, I agree with Stephen:

> 
> Irrespective of all this though, even if there is a kernel issue and
> it can be fixed, I still think we should apply this patch, because
> the issue currently affects people. At the very least it will until
> some kernel fix is rolled out to everyone's distro, which will be a
> while no matter what.

+1

The problem seems to be with long time running linux. The error seems
to be orthogonal to our u-boot's UMS work.

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Best regards,
Lukasz Majewski
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