net: lan966x: Stop processing the MAC entry is port is wrong.

Currently when getting a new MAC is learn, the HW generates an
interrupt. So then the SW will check the new entry and checks if it
arrived on a correct port. If it didn't just generate a warning.
But this could still crash the system. Therefore stop processing that
entry when an issue is seen.

Fixes: ab3e5f5e79c695 ("net: lan966x: add support for interrupts from analyzer")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c b/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
index ce5970bdcc6a0791242a6663ae8b1e81f7897ad3..2679111ef66960b8171387ced2dd62d15f98cfed 100644 (file)
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
@@ -346,7 +346,8 @@ static void lan966x_mac_irq_process(struct lan966x *lan966x, u32 row,
 
                        lan966x_mac_process_raw_entry(&raw_entries[column],
                                                      mac, &vid, &dest_idx);
-                       WARN_ON(dest_idx > lan966x->num_phys_ports);
+                       if (WARN_ON(dest_idx > lan966x->num_phys_ports))
+                               continue;
 
                        /* If the entry in SW is found, then there is nothing
                         * to do
@@ -392,7 +393,8 @@ static void lan966x_mac_irq_process(struct lan966x *lan966x, u32 row,
 
                lan966x_mac_process_raw_entry(&raw_entries[column],
                                              mac, &vid, &dest_idx);
-               WARN_ON(dest_idx > lan966x->num_phys_ports);
+               if (WARN_ON(dest_idx > lan966x->num_phys_ports))
+                       continue;
 
                mac_entry = lan966x_mac_alloc_entry(mac, vid, dest_idx);
                if (!mac_entry)