From: Johan Hovold <johan@kernel.org>
Date: Mon, 14 Dec 2015 15:16:19 +0000 (+0100)
Subject: spi: fix parent-device reference leak
X-Git-Tag: v3.4.113~44
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b17302a80d89c84ea3bdf7205ae363b7c12e3b7;p=thirdparty%2Fkernel%2Fstable.git

spi: fix parent-device reference leak

commit 157f38f993919b648187ba341bfb05d0e91ad2f6 upstream.

Fix parent-device reference leak due to SPI-core taking an unnecessary
reference to the parent when allocating the master structure, a
reference that was never released.

Note that driver core takes its own reference to the parent when the
master device is registered.

Fixes: 49dce689ad4e ("spi doesn't need class_device")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Zefan Li <lizefan@huawei.com>
---

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index a3f31e9ab2142..516fd23ba0d52 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -846,7 +846,7 @@ struct spi_master *spi_alloc_master(struct device *dev, unsigned size)
 
 	device_initialize(&master->dev);
 	master->dev.class = &spi_master_class;
-	master->dev.parent = get_device(dev);
+	master->dev.parent = dev;
 	spi_master_set_devdata(master, &master[1]);
 
 	return master;