netdev - [PATCH 1/1] ixgbevf: avoid checking hang when performing hardware reset

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Message-Id: <1468849489-8407-1-git-send-email-zyjzyj2000@gmail.com>
Date:	Mon, 18 Jul 2016 21:44:49 +0800
From:	zyjzyj2000@...il.com
To:	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
	jeffrey.t.kirsher@...el.com
Cc:	Zhu Yanjun <zyjzyj2000@...il.com>
Subject: [PATCH 1/1] ixgbevf: avoid checking hang when performing hardware reset

From: Zhu Yanjun <zyjzyj2000@...il.com>

When performing hardware reset, it is not necessary to check hang.
Or else, the call trace will appear.

Signed-off-by: Zhu Yanjun <zyjzyj2000@...il.com>
---
 drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index acc2401..d563d24 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -2792,9 +2792,14 @@ static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter)
 static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter)
 {
 	struct ixgbe_hw *hw = &adapter->hw;
+	struct ixgbe_mbx_info *mbx = &hw->mbx;
 	u32 eics = 0;
 	int i;
 
+	/* When performing hardware reset, unnecessary to check hang. */
+	if (mbx->ops.check_for_rst(hw))
+		return;
+
 	/* If we're down or resetting, just bail */
 	if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
 	    test_bit(__IXGBEVF_RESETTING, &adapter->state))
-- 
2.7.4