Patch "net: dsa: mv88e6xxx: lock mutex when freeing IRQs" has been added to the 4.13-stable tree

Patch "net: dsa: mv88e6xxx: lock mutex when freeing IRQs" has been added to the 4.13-stable tree

[gregkh]

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

    net: dsa: mv88e6xxx: lock mutex when freeing IRQs

to the 4.13-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-dsa-mv88e6xxx-lock-mutex-when-freeing-irqs.patch
and it can be found in the queue-4.13 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 Mon Oct  9 09:32:35 CEST 2017
From: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Date: Tue, 26 Sep 2017 14:57:21 -0400
Subject: net: dsa: mv88e6xxx: lock mutex when freeing IRQs

From: Vivien Didelot <vivien.didelot@savoirfairelinux.com>


[ Upstream commit b32ca44a88def4bf92626d8777494c6f14638c42 ]

mv88e6xxx_g2_irq_free locks the registers mutex, but not
mv88e6xxx_g1_irq_free, which results in a stack trace from
assert_reg_lock when unloading the mv88e6xxx module. Fix this.

Fixes: 3460a5770ce9 ("net: dsa: mv88e6xxx: Mask g1 interrupts and free interrupt")
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-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/dsa/mv88e6xxx/chip.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -4019,7 +4019,9 @@ static void mv88e6xxx_remove(struct mdio
 	if (chip->irq > 0) {
 		if (mv88e6xxx_has(chip, MV88E6XXX_FLAG_G2_INT))
 			mv88e6xxx_g2_irq_free(chip);
+		mutex_lock(&chip->reg_lock);
 		mv88e6xxx_g1_irq_free(chip);
+		mutex_unlock(&chip->reg_lock);
 	}
 }
 


Patches currently in stable-queue which might be from vivien.didelot@savoirfairelinux.com are

queue-4.13/net-dsa-mv88e6xxx-allow-dsa-and-cpu-ports-in-multiple-vlans.patch
queue-4.13/net-dsa-mv88e6xxx-lock-mutex-when-freeing-irqs.patch