linux-kernel - [PATCH 3.16 066/254] net: mvmdio: disable/unprepare clocks in EPROBE

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Date:   Wed, 28 Feb 2018 15:20:18 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Andrew Lunn" <andrew@...n.ch>,
        "David S. Miller" <davem@...emloft.net>,
        "Tobias Jordan" <Tobias.Jordan@...ktrobit.com>
Subject: [PATCH 3.16 066/254] net: mvmdio: disable/unprepare clocks in
 EPROBE_DEFER case

3.16.55-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Tobias Jordan <Tobias.Jordan@...ktrobit.com>

commit 589bf32f09852041fbd3b7ce1a9e703f95c230ba upstream.

add appropriate calls to clk_disable_unprepare() by jumping to out_mdio
in case orion_mdio_probe() returns -EPROBE_DEFER.

Found by Linux Driver Verification project (linuxtesting.org).

Fixes: 3d604da1e954 ("net: mvmdio: get and enable optional clock")
Signed-off-by: Tobias Jordan <Tobias.Jordan@...ktrobit.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/ethernet/marvell/mvmdio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/marvell/mvmdio.c
+++ b/drivers/net/ethernet/marvell/mvmdio.c
@@ -241,7 +241,8 @@ static int orion_mdio_probe(struct platf
 			dev->regs + MVMDIO_ERR_INT_MASK);
 
 	} else if (dev->err_interrupt == -EPROBE_DEFER) {
-		return -EPROBE_DEFER;
+		ret = -EPROBE_DEFER;
+		goto out_mdio;
 	}
 
 	mutex_init(&dev->lock);