linux-kernel - [PATCH] net: ethernet: fix kernel OOPS when remove davinci

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Message-ID: <1346344652-28487-1-git-send-email-b-liu@ti.com>
Date:	Thu, 30 Aug 2012 11:37:32 -0500
From:	Bin Liu <b-liu@...com>
To:	<mugunthanvnm@...com>, <vaibhav.bedia@...com>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:	<b-liu@...com>
Subject: [PATCH] net: ethernet: fix kernel OOPS when remove davinci_mdio module

davinci mdio device is not unregistered from mdiobus when removing
the module, which causes BUG_ON() when free the device from mdiobus.

Calling mdiobus_unregister() before mdiobus_free() fixes the issue.

Signed-off-by: Bin Liu <b-liu@...com>
---
 drivers/net/ethernet/ti/davinci_mdio.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ethernet/ti/davinci_mdio.c b/drivers/net/ethernet/ti/davinci_mdio.c
index 0c2fcdd..7de19a5 100644
--- a/drivers/net/ethernet/ti/davinci_mdio.c
+++ b/drivers/net/ethernet/ti/davinci_mdio.c
@@ -391,8 +391,10 @@ static int __devexit davinci_mdio_remove(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct davinci_mdio_data *data = dev_get_drvdata(dev);
 
-	if (data->bus)
+	if (data->bus) {
+		mdiobus_unregister(data->bus);
 		mdiobus_free(data->bus);
+	}
 
 	if (data->clk)
 		clk_put(data->clk);
-- 
1.7.0.4

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