netdev - [net-next] e1000e: balance semaphore put/get for 82573

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Message-Id: <1377303577-12180-1-git-send-email-jeffrey.t.kirsher@intel.com>
Date:	Fri, 23 Aug 2013 17:19:37 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	davem@...emloft.net
Cc:	Steven La <sla@...erbed.com>, netdev@...r.kernel.org,
	gospo@...hat.com, sassmann@...hat.com,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next] e1000e: balance semaphore put/get for 82573

From: Steven La <sla@...erbed.com>

Steven (cc-ed) noticed an imbalance in semaphore put/get for
82573-based NICs. Don't we need something like the following
(untested) patch?

Signed-off-by: Steven La <sla@...erbed.com>
Acked-by: Arthur Kepner <akepner@...erbed.com>
Tested-by: Aaron Brown <aaron.f.brown@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/e1000e/82571.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/intel/e1000e/82571.c b/drivers/net/ethernet/intel/e1000e/82571.c
index 104fcec..8fed74e 100644
--- a/drivers/net/ethernet/intel/e1000e/82571.c
+++ b/drivers/net/ethernet/intel/e1000e/82571.c
@@ -1011,6 +1011,11 @@ static s32 e1000_reset_hw_82571(struct e1000_hw *hw)
 
 	/* Must release MDIO ownership and mutex after MAC reset. */
 	switch (hw->mac.type) {
+	case e1000_82573:
+		/* Release mutex only if the hw semaphore is acquired */
+		if (!ret_val)
+			e1000_put_hw_semaphore_82573(hw);
+		break;
 	case e1000_82574:
 	case e1000_82583:
 		/* Release mutex only if the hw semaphore is acquired */
-- 
1.8.3.1

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