Eric Dumazet cbdf451164
net_sched: prio: properly report out of memory errors ...
At Qdisc creation or change time, prio_tune() creates missing
pfifo qdiscs but does not return an error code if one
qdisc could not be allocated.
Leaving a qdisc in non operational state without telling user
anything about this problem is not good.
Also, testing if we replace something different than noop_qdisc
a second time makes no sense so I removed useless code.
Signed-off-by: Eric Dumazet <edumazet@google.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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cbdf451164