[PATCH AUTOSEL 4.19 046/100] net: dsa: mv88e6xxx: Release lock while requesting IRQ
From: Sasha Levin <sashal@kernel.org>
Date: 2019-10-18 22:06:53
Also in:
lkml, stable
Subsystem:
marvell 88e6xxx ethernet switch fabric driver, networking drivers, networking [dsa], the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Linus Torvalds
From: Andrew Lunn <andrew@lunn.ch> [ Upstream commit 342a0ee70acbee97fdeb91349420f8744eb291fb ] There is no need to hold the register lock while requesting the GPIO interrupt. By not holding it we can also avoid a false positive lockdep splat. Reported-by: Russell King <redacted> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/net/dsa/mv88e6xxx/chip.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 703e6bdaf0e1f..d075f0f7a3de8 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c@@ -456,10 +456,12 @@ static int mv88e6xxx_g1_irq_setup(struct mv88e6xxx_chip *chip) */ irq_set_lockdep_class(chip->irq, &lock_key, &request_key); + mutex_unlock(&chip->reg_lock); err = request_threaded_irq(chip->irq, NULL, mv88e6xxx_g1_irq_thread_fn, IRQF_ONESHOT, dev_name(chip->dev), chip); + mutex_lock(&chip->reg_lock); if (err) mv88e6xxx_g1_irq_free_common(chip);
--
2.20.1