tree 488a09415a2b84f82e3612d45694f292218197a5
parent 8626c56c8279b88b91b8df55345cdf89542d5e90
author Gregory CLEMENT <gregory.clement@free-electrons.com> 1457804657 +0100
committer David S. Miller <davem@davemloft.net> 1457984931 -0400

net: mvneta: Fix spinlock usage

In the previous patch, the spinlock was not initialized. While it didn't
cause any trouble yet it could be a problem to use it uninitialized.

The most annoying part was the critical section protected by the spinlock
in mvneta_stop(). Some of the functions could sleep as pointed when
activated CONFIG_DEBUG_ATOMIC_SLEEP. Actually, in mvneta_stop() we only
need to protect the is_stopped flagged, indeed the code of the notifier
for CPU online is protected by the same spinlock, so when we get the
lock, the notifer work is done.

Reported-by: Patrick Uiterwijk <patrick@puiterwijk.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>