Patch "net: mdio-mux: bcm-iproc: call mdiobus_free() in error path" has been added to the 4.9-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    net: mdio-mux: bcm-iproc: call mdiobus_free() in error path

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-mdio-mux-bcm-iproc-call-mdiobus_free-in-error-path.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu May 11 11:08:24 CEST 2017
From: Jon Mason <jon.mason@broadcom.com>
Date: Mon, 8 May 2017 17:48:35 -0400
Subject: net: mdio-mux: bcm-iproc: call mdiobus_free() in error path

From: Jon Mason <jon.mason@broadcom.com>


[ Upstream commit 922c60e89d52730050c6ccca218bff40cc8bcd8e ]

If an error is encountered in mdio_mux_init(), the error path will call
mdiobus_free().  Since mdiobus_register() has been called prior to
mdio_mux_init(), the bus->state will not be MDIOBUS_UNREGISTERED.  This
causes a BUG_ON() in mdiobus_free().  To correct this issue, add an
error path for mdio_mux_init() which calls mdiobus_unregister() prior to
mdiobus_free().

Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Fixes: 98bc865a1ec8 ("net: mdio-mux: Add MDIO mux driver for iProc SoCs")
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/phy/mdio-mux-bcm-iproc.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/net/phy/mdio-mux-bcm-iproc.c
+++ b/drivers/net/phy/mdio-mux-bcm-iproc.c
@@ -203,11 +203,14 @@ static int mdio_mux_iproc_probe(struct p
 			   &md->mux_handle, md, md->mii_bus);
 	if (rc) {
 		dev_info(md->dev, "mdiomux initialization failed\n");
-		goto out;
+		goto out_register;
 	}
 
 	dev_info(md->dev, "iProc mdiomux registered\n");
 	return 0;
+
+out_register:
+	mdiobus_unregister(bus);
 out:
 	mdiobus_free(bus);
 	return rc;


Patches currently in stable-queue which might be from jon.mason@broadcom.com are

queue-4.9/arm-dts-nsp-gpio-reboot-open-source.patch
queue-4.9/net-mdio-mux-bcm-iproc-call-mdiobus_free-in-error-path.patch