[dpdk-dev] examples/l3fwd-power: fix RX interrupt disable

[Thomas Monjalon]

+Cc Dave, the maintainer

> > Interrupt will not be received when disabling RX interrupt without
> > synchronization mechanism sometimes which leads to wake up issue,
> > add spinlock to fix it.
> > 
> > Fixes: b736d64787fc ("mples/l3fwd-power: disable Rx interrupt when
> > waking up")
> > Cc: stable at dpdk.org
> > 
> > Signed-off-by: Xiao Zhang <xiao.zhang at intel.com>
> > ---
> >  examples/l3fwd-power/main.c | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
> > index fd8d952..ff1ad37 100644
> > --- a/examples/l3fwd-power/main.c
> > +++ b/examples/l3fwd-power/main.c
> > @@ -880,7 +880,9 @@ sleep_until_rx_interrupt(int num)
> >  		port_id = ((uintptr_t)data) >> CHAR_BIT;
> >  		queue_id = ((uintptr_t)data) &
> >  			RTE_LEN2MASK(CHAR_BIT, uint8_t);
> > +		rte_spinlock_lock(&(locks[port_id]));
> >  		rte_eth_dev_rx_intr_disable(port_id, queue_id);
> > +		rte_spinlock_unlock(&(locks[port_id]));
> >  		RTE_LOG(INFO, L3FWD_POWER,
> >  			"lcore %u is waked up from rx interrupt on"
> >  			" port %d queue %d\n",
> > --
> > 2.7.4
> 
> Reviewed-by: Marvin Liu <yong.liu at intel.com>