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path: root/drivers/net/ethernet/intel/igbvf/mbx.c
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Diffstat (limited to 'drivers/net/ethernet/intel/igbvf/mbx.c')
-rw-r--r--drivers/net/ethernet/intel/igbvf/mbx.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igbvf/mbx.c b/drivers/net/ethernet/intel/igbvf/mbx.c
index 01752f44ace2..c9a441632e9f 100644
--- a/drivers/net/ethernet/intel/igbvf/mbx.c
+++ b/drivers/net/ethernet/intel/igbvf/mbx.c
@@ -264,6 +264,8 @@ static s32 e1000_write_mbx_vf(struct e1000_hw *hw, u32 *msg, u16 size)
s32 err;
u16 i;
+ WARN_ON_ONCE(!spin_is_locked(&hw->mbx_lock));
+
/* lock the mailbox to prevent pf/vf race condition */
err = e1000_obtain_mbx_lock_vf(hw);
if (err)
@@ -300,6 +302,8 @@ static s32 e1000_read_mbx_vf(struct e1000_hw *hw, u32 *msg, u16 size)
s32 err;
u16 i;
+ WARN_ON_ONCE(!spin_is_locked(&hw->mbx_lock));
+
/* lock the mailbox to prevent pf/vf race condition */
err = e1000_obtain_mbx_lock_vf(hw);
if (err)