From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Senna Tschudin Subject: [PATCH 2/2] drivers/net/phy/mdio-bitbang.c: Call mdiobus_unregister before mdiobus_free Date: Sun, 28 Oct 2012 17:12:01 +0100 Message-ID: <1351440721-9121-2-git-send-email-peter.senna@gmail.com> References: <1351440721-9121-1-git-send-email-peter.senna@gmail.com> Cc: srinivas.kandagatla@st.com, peter.senna@gmail.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org To: davem@davemloft.net Return-path: In-Reply-To: <1351440721-9121-1-git-send-email-peter.senna@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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/): // @@ expression E; @@ ... when != mdiobus_unregister(E); + mdiobus_unregister(E); mdiobus_free(E); // Signed-off-by: Peter Senna Tschudin --- 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/phy/mdio-bitbang.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/phy/mdio-bitbang.c b/drivers/net/phy/mdio-bitbang.c index daec9b0..6428fcb 100644 --- a/drivers/net/phy/mdio-bitbang.c +++ b/drivers/net/phy/mdio-bitbang.c @@ -234,6 +234,7 @@ void free_mdio_bitbang(struct mii_bus *bus) struct mdiobb_ctrl *ctrl = bus->priv; module_put(ctrl->ops->owner); + mdiobus_unregister(bus); mdiobus_free(bus); } EXPORT_SYMBOL(free_mdio_bitbang); -- 1.7.11.7