ixgbe: Additional adapter removal checks

Additional checks are needed for a detected removal not to cause
problems. Some involve simply avoiding a lot of stuff that can't
do anything good, and also cases where the phony return value can
cause problems. In addition, down the adapter when the removal is
sensed.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 9831a244d5ba..3ca59d21d0b2 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -291,6 +291,7 @@ static void ixgbe_remove_adapter(struct ixgbe_hw *hw)
 		return;
 	hw->hw_addr = NULL;
 	e_dev_err("Adapter removed\n");
+	ixgbe_service_event_schedule(adapter);
 }
 
 void ixgbe_check_remove(struct ixgbe_hw *hw, u32 reg)
@@ -3338,6 +3339,8 @@ static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
 	u32 rxdctl;
 	u8 reg_idx = ring->reg_idx;
 
+	if (ixgbe_removed(hw->hw_addr))
+		return;
 	/* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
 	if (hw->mac.type == ixgbe_mac_82598EB &&
 	    !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
@@ -3362,6 +3365,8 @@ void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
 	u32 rxdctl;
 	u8 reg_idx = ring->reg_idx;
 
+	if (ixgbe_removed(hw->hw_addr))
+		return;
 	rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
 	rxdctl &= ~IXGBE_RXDCTL_ENABLE;
 
@@ -4687,6 +4692,8 @@ void ixgbe_reset(struct ixgbe_adapter *adapter)
 	struct ixgbe_hw *hw = &adapter->hw;
 	int err;
 
+	if (ixgbe_removed(hw->hw_addr))
+		return;
 	/* lock SFP init bit to prevent race conditions with the watchdog */
 	while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
 		usleep_range(1000, 2000);
@@ -6397,6 +6404,15 @@ static void ixgbe_service_task(struct work_struct *work)
 	struct ixgbe_adapter *adapter = container_of(work,
 						     struct ixgbe_adapter,
 						     service_task);
+	if (ixgbe_removed(adapter->hw.hw_addr)) {
+		if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
+			rtnl_lock();
+			ixgbe_down(adapter);
+			rtnl_unlock();
+		}
+		ixgbe_service_event_complete(adapter);
+		return;
+	}
 	ixgbe_reset_subtask(adapter);
 	ixgbe_sfp_detection_subtask(adapter);
 	ixgbe_sfp_link_config_subtask(adapter);