[PATCH 4.4 20/31] mfd: core: Fix device reference leak in mfd_clone_cell

[Greg Kroah-Hartman]

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

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

From: Johan Hovold <jo...@kernel.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 <jo...@kernel.org>
Signed-off-by: Lee Jones <lee.jo...@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.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);