examples/l3fwd-power: fix Rx interrupt disabling

[ upstream commit 0412cfe ]

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: b736d64 ("examples/l3fwd-power: disable Rx interrupt when waking up")

Signed-off-by: Xiao Zhang <xiao.zhang@intel.com>
Reviewed-by: Marvin Liu <yong.liu@intel.com>
Acked-by: David Hunt <david.hunt@intel.com>

examples/l3fwd-power/main.c

@@ -814,7 +814,9 @@ 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",