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Date: Tue, 17 Oct 2017 16:15:30 +0200
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Ben Hutchings <ben.hutchings@codethink.co.uk>
Cc: stable <stable@vger.kernel.org>, David Eccher <d.eccher@gmail.com>,
        Felipe Balbi <balbi@ti.com>
Subject: Re: [3.18-stable] Revert "usb: gadget: inode.c: fix unbalanced
 spin_lock in ep0_write"
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On Tue, Oct 17, 2017 at 01:55:58PM +0100, Ben Hutchings wrote:
> Please revert commit abb540b53976 ("usb: gadget: inode.c: fix
> unbalanced spin_lock in ep0_write") on the 3.18 stable branch.  The
> upstream commit (b7bd98b7db9f) fixed a bug introduced in 4.0 by commit
> 96b62a571934 ("gadgetfs: really get rid of switching ->f_op"). 
> Backporting it to older versions introduces a lock unbalance.

Ugh, you are right, this was my fault, and kbuild also complained about
this.

now reverted.

greg k-h