netdev - [PATCH RFC 1/4] net: mvmdio: disable interrupts in driver failure path

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Message-Id: <E1cPpAa-0005u5-LW@rmk-PC.armlinux.org.uk>
Date:   Sat, 07 Jan 2017 11:28:20 +0000
From:   Russell King <rmk+kernel@...linux.org.uk>
To:     Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Andrew Lunn <andrew@...n.ch>,
        Jason Cooper <jason@...edaemon.net>,
        Gregory Clement <gregory.clement@...e-electrons.com>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Marcin Wojtas <mw@...ihalf.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        netdev@...r.kernel.org
Subject: [PATCH RFC 1/4] net: mvmdio: disable interrupts in driver failure
 path

When the mvmdio driver has an interrupt, it enables the "done" interrupt
after requesting its interrupt handler.  However, probe failure results
in the interrupt being left enabled.  Disable it on the failure path.

Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
---
 drivers/net/ethernet/marvell/mvmdio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c
index a0d1b084ecec..7aea0beca56e 100644
--- a/drivers/net/ethernet/marvell/mvmdio.c
+++ b/drivers/net/ethernet/marvell/mvmdio.c
@@ -251,6 +251,8 @@ static int orion_mdio_probe(struct platform_device *pdev)
 	return 0;
 
 out_mdio:
+	if (dev->err_interrupt > 0)
+		writel(0, dev->regs + MVMDIO_ERR_INT_MASK);
 	if (!IS_ERR(dev->clk))
 		clk_disable_unprepare(dev->clk);
 	return ret;
-- 
2.7.4