irq: do not process non-existant irq number of lo

Prevent IRQ affinity restore of lo device, since we do not collect it
and since it doesn't have a IRQ number. This fixes a warning on trafgen
and netsniff-ng when exiting.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/irq.c b/irq.c
index 4132d19..2f7eafa 100644
--- a/irq.c
+++ b/irq.c
@@ -99,6 +99,8 @@ int device_set_irq_affinity_list(int irq, unsigned long from, unsigned long to)
 	int ret, fd;
 	char file[128], list[64];
 
+	if (unlikely(irq == 0))
+		return 0;
 	if (!nic_irq_stored) {
 		nic_irq = irq;
 		device_save_irq_affinity_list();