linux-kernel - [PATCH 4.4 20/31] mfd: core: Fix device reference leak in mfd_clone

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Message-Id: <20161124145448.012559990@linuxfoundation.org>
Date:   Thu, 24 Nov 2016 15:55:41 +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, Johan Hovold <johan@...nel.org>,
        Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 4.4 20/31] mfd: core: Fix device reference leak in mfd_clone_cell

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

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

From: Johan Hovold <johan@...nel.org>

commit 722f191080de641f023feaa7d5648caf377844f5 upstream.

Make sure to drop the reference taken by bus_find_device_by_name()
before returning from mfd_clone_cell().

Fixes: a9bbba996302 ("mfd: add platform_device sharing support for mfd")
Signed-off-by: Johan Hovold <johan@...nel.org>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mfd/mfd-core.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -354,6 +354,8 @@ int mfd_clone_cell(const char *cell, con
 					clones[i]);
 	}
 
+	put_device(dev);
+
 	return 0;
 }
 EXPORT_SYMBOL(mfd_clone_cell);