Gregory CLEMENT 120cfa502c
net: mvneta: Fix race condition during stopping ...
When stopping the port, the CPU notifier are still there whereas the
mvneta_stop_dev function calls mvneta_percpu_disable() on each CPUs.
It was possible to have a new CPU coming at this point which could be
racy.
This patch adds a flag preventing executing the code notifier for a new
CPU when the port is stopping. It also uses the spinlock introduces
previously. To avoid the deadlock, the lock has been moved outside the
mvneta_percpu_elect function.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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120cfa502c