linux-kernel - [PATCH 200/241] drivers/net/ethernet/nxp/lpc_eth.c: Call mdiobus_unregister before mdiobus

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Date:	Thu, 13 Dec 2012 11:59:25 -0200
From:	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Peter Senna Tschudin <peter.senna@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
Subject: [PATCH 200/241] drivers/net/ethernet/nxp/lpc_eth.c: Call mdiobus_unregister before mdiobus_free

3.5.7.2 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Peter Senna Tschudin <peter.senna@...il.com>

commit 57c10b61c84bfed68b1b317d6f507a392724b9c4 upstream.

Based on commit b27393aecf66199f5ddad37c302d3e0cfadbe6c0

Calling mdiobus_free without calling mdiobus_unregister causes
BUG_ON(). This patch fixes the issue.

The semantic patch that found this issue(http://coccinelle.lip6.fr/):
// <smpl>
@@
expression E;
@@
  ... when != mdiobus_unregister(E);

+ mdiobus_unregister(E);
  mdiobus_free(E);
// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@...il.com>
Tested-by: Roland Stigge <stigge@...com.de>
Tested-by: Alexandre Pereira da Silva <aletes.xgr@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
---
 drivers/net/ethernet/nxp/lpc_eth.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index 083d671..6793190 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -1543,6 +1543,7 @@ static int lpc_eth_drv_remove(struct platform_device *pdev)
 				  pldat->dma_buff_base_p);
 	free_irq(ndev->irq, ndev);
 	iounmap(pldat->net_base);
+	mdiobus_unregister(pldat->mii_bus);
 	mdiobus_free(pldat->mii_bus);
 	clk_disable(pldat->clk);
 	clk_put(pldat->clk);
-- 
1.7.9.5

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