[PATCH 1/2] drivers/net/ethernet/nxp/lpc_eth.c: Call mdiobus_unregister before mdiobus_free
From: Peter Senna Tschudin <peter.senna@gmail.com>
Date: 2012-10-28 16:12:16
Also in:
kernel-janitors, lkml
Subsystem:
arm/lpc32xx soc support, networking drivers, the rest · Maintainers:
Vladimir Zapolskiy, Piotr Wojtaszczyk, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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@gmail.com> --- This problem is somewhat mystifying. If the patch is correct, there were probably many OOPSese caused by not calling mdiobus_unregister... Reporting anyway... 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 53743f7..af8b414 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c@@ -1524,6 +1524,7 @@ 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);
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1.7.11.7