From 4001998a43f4791b6e6c06df563f5d5bb3fbe4fb Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Wed, 13 Aug 2014 12:23:10 +0100
Subject: [PATCH] misc: st_core: Protect unsigned value against becoming
 negative

Coverity reported:
  This less-than-zero comparison of an unsigned value is never true.

In answer to that, we only ever decrement if protos_registered is
positive.  We can subsequently remove the paranoid checking during
unregister.

Cc: gregkh@linuxfoundation.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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