netdev - [PATCH v2 net-next 6/6] net: dsa: mv88e6xxx: Hold the mutex while freeing g1 interrupts

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Message-Id: <1479669260-14638-7-git-send-email-andrew@lunn.ch>
Date:   Sun, 20 Nov 2016 20:14:19 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     David Miller <davem@...emloft.net>
Cc:     Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        netdev <netdev@...r.kernel.org>, Andrew Lunn <andrew@...n.ch>
Subject: [PATCH v2 net-next 6/6] net: dsa: mv88e6xxx: Hold the mutex while freeing g1 interrupts

Freeing interrupts requires switch register access to mask the
interrupts. Hence we must hold the register mutex.

Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 614b2f68d401..e30d0eaf2b5f 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -3916,8 +3916,11 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
 	if (mv88e6xxx_has(chip, MV88E6XXX_FLAG_G2_INT) && chip->irq > 0)
 		mv88e6xxx_g2_irq_free(chip);
 out_g1_irq:
-	if (chip->irq > 0)
+	if (chip->irq > 0) {
+		mutex_lock(&chip->reg_lock);
 		mv88e6xxx_g1_irq_free(chip);
+		mutex_unlock(&chip->reg_lock);
+	}
 out:
 	return err;
 }
-- 
2.10.2