igbvf: avoid reset storms due to mailbox issues
From: Alexander Duyck <alexander.h.duyck@intel.com>
This change makes it so that reset/interrupt storms can be avoided when
there are mailbox issues. The new behavior is to only allow the device to
trigger mailbox related resets only once every 10 seconds.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/igbvf/netdev.c b/drivers/net/igbvf/netdev.c
index a127620..e9dd95f 100644
--- a/drivers/net/igbvf/netdev.c
+++ b/drivers/net/igbvf/netdev.c
@@ -1469,6 +1469,8 @@
memcpy(netdev->perm_addr, adapter->hw.mac.addr,
netdev->addr_len);
}
+
+ adapter->last_reset = jiffies;
}
int igbvf_up(struct igbvf_adapter *adapter)
@@ -1812,11 +1814,15 @@
s32 ret_val = E1000_SUCCESS;
bool link_active;
+ /* If interface is down, stay link down */
+ if (test_bit(__IGBVF_DOWN, &adapter->state))
+ return false;
+
ret_val = hw->mac.ops.check_for_link(hw);
link_active = !hw->mac.get_link_status;
/* if check for link returns error we will need to reset */
- if (ret_val)
+ if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
schedule_work(&adapter->reset_task);
return link_active;
