linux-kernel - [PATCH 4.14 100/159] optee: fix invalid of_node_put() in optee_driver

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Date:   Fri, 22 Dec 2017 09:46:25 +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, Alex Shi <alex.shi@...aro.org>,
        Jens Wiklander <jens.wiklander@...aro.org>,
        andi@...ux-stable.l.notmuch.email
Subject: [PATCH 4.14 100/159] optee: fix invalid of_node_put() in optee_driver_init()

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

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

From: Jens Wiklander <jens.wiklander@...aro.org>

commit f044113113dd95ba73916bde10e804d3cdfa2662 upstream.

The first node supplied to of_find_matching_node() has its reference
counter decreased as part of call to that function. In optee_driver_init()
after calling of_find_matching_node() it's invalid to call of_node_put() on
the supplied node again.

So remove the invalid call to of_node_put().

Reported-by: Alex Shi <alex.shi@...aro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@...aro.org>
Cc: <andi@...ux-stable.l.notmuch.email>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/tee/optee/core.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/tee/optee/core.c
+++ b/drivers/tee/optee/core.c
@@ -590,7 +590,6 @@ static int __init optee_driver_init(void
 		return -ENODEV;
 
 	np = of_find_matching_node(fw_np, optee_match);
-	of_node_put(fw_np);
 	if (!np)
 		return -ENODEV;