linux-kernel - [PATCH 4.9 092/241] NFC: pn533: change order of free

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Date:   Mon, 19 Mar 2018 19:05:57 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Andrey Rusalin <arusalin@....rtsoft.ru>,
        Samuel Ortiz <sameo@...ux.intel.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.9 092/241] NFC: pn533: change order of free_irq and dev unregistration

4.9-stable review patch.  If anyone has any objections, please let me know.

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

From: Andrey Rusalin <arusalin@....rtsoft.ru>


[ Upstream commit 068a496c4525c638ffab56449d905b88ef97fe32 ]

Change order of free_irq and dev unregistration.
It fixes situation when device already unregistered and
an interrupt happens and nobody can handle it.

Signed-off-by: Andrey Rusalin <arusalin@....rtsoft.ru>
Signed-off-by: Samuel Ortiz <sameo@...ux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/nfc/pn533/i2c.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/nfc/pn533/i2c.c
+++ b/drivers/nfc/pn533/i2c.c
@@ -242,10 +242,10 @@ static int pn533_i2c_remove(struct i2c_c
 
 	dev_dbg(&client->dev, "%s\n", __func__);
 
-	pn533_unregister_device(phy->priv);
-
 	free_irq(client->irq, phy);
 
+	pn533_unregister_device(phy->priv);
+
 	return 0;
 }