Re: [PATCHv2] usb: musb: Fix unbalanced platform_disable

[Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>]

* Laurent Pinchart <laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org> [160919 23:36]:
> Hi Tony,
> 
> On Monday 19 Sep 2016 15:41:50 Tony Lindgren wrote:
> > * Laurent Pinchart <laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org> [160919 13:35]:
> > > On Sunday 18 Sep 2016 08:19:02 Tony Lindgren wrote:
> > >>> [    5.711303] [<c0872788>] (_raw_spin_unlock_irqrestore) from
> > >>> [<c069b260>]
> > >>> (musb_gadget_queue+0x128/0x4ac)
> > >>> [    5.711303] [<c069b260>] (musb_gadget_queue) from [<c06a9ae4>]
> > >>> (usb_ep_queue+0x38/0x1d4)
> > >>> [    5.729766] [<c06a9ae4>] (usb_ep_queue) from [<c06aba40>]
> > >>> (rx_submit+0xc8/0x19c)
> > >>> [    5.737548] [<c06aba40>] (rx_submit) from [<c06abb90>]
> > >>> (rx_fill+0x7c/0xa0) [    5.737548] [<c06abb90>] (rx_fill) from
> > >>> [<c06abbdc>] (eth_start+0x28/0x48) [    5.751983] [<c06abbdc>]
> > >>> (eth_start) from [<c06abe7c>] (eth_open+0x6c/0x7c) [    5.751983]
> > >>> [<c06abe7c>] (eth_open) from [<c0778c2c>]
> > >>> (__dev_open+0x9c/0x104)
> > >> 
> > >> This could be something else though. Care to email me your .config,
> > >> maybe this is related to legacy g_ether being built in?
> > > 
> > > Sure, please find it attached. The legacy g_ether is indeed built-in,
> > > that's what I use to boot over nfsroot.
> > 
> > OK, I think g_ether may have issues in general..
> > 
> > I mostly test with configfs based gadgets and shell script as then I can
> > test load/configure/connect/disconnect/unconfigure/unload easily :)
> 
> g_ether is very convenient when using nfsroot, as it allows booting the system 
> without an initramfs.

Yeah no doubt about that.

> > >> Anyways, please also give the following patch a try.
> > > 
> > > I've tested the patch and if fixes the original problem. Warm reboots are
> > > still broken though.
> > 
> > No luck here with your .config a try with my pandaboard es against v4.8-rc7
> > plus the patch I posted on Sunday. It reboots with no errors for me with
> > NFSroot. Do you do something other than just reboot?
> 
> No, I perform the following steps:
> 
> - Connect the panda board to the USB through USB (which powers the board on)
> - Let the board boot over NFS
> - Log in as root, run 'reboot'
> 
> The second boot produces the warning.

Oh I was looking at the errors while shutting down things.. OK yeah I get
that too along with a bunch of DSS related warnings with your .config.
Probably I did not notice it earlier because of the DSS warnings. Will
take a look.

Thanks,

Tony
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