From 7d6446db1bcb1008b84db098f4629664cd8b06a6 Mon Sep 17 00:00:00 2001 From: Emil Tantilov Date: Tue, 22 May 2018 09:18:46 -0700 Subject: [PATCH] ixgbevf: fix possible race in the reset subtask Extend the RTNL lock in ixgbevf_reset_subtask() to protect the state bits check in addition to the call to ixgbevf_reinit_locked(). This is to make sure that we get the most up-to-date values for the bits and avoid a possible race when going down. Suggested-by: Zhiping du Signed-off-by: Emil Tantilov Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index 2d5a706..59416ed 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -3141,15 +3141,17 @@ static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter) if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state)) return; + rtnl_lock(); /* If we're already down or resetting, just bail */ if (test_bit(__IXGBEVF_DOWN, &adapter->state) || test_bit(__IXGBEVF_REMOVING, &adapter->state) || - test_bit(__IXGBEVF_RESETTING, &adapter->state)) + test_bit(__IXGBEVF_RESETTING, &adapter->state)) { + rtnl_unlock(); return; + } adapter->tx_timeout_count++; - rtnl_lock(); ixgbevf_reinit_locked(adapter); rtnl_unlock(); } -- 2.7.4