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: Ben Hutchings <ben@decadent.org.uk>
(cherry picked from commit 40ddf30ca43b50019304303949c9b2676cfbd820)
Signed-off-by: Willy Tarreau <w@1wt.eu>

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index b76f2468a84a10d6afa8f6a583b1e9bb44c79bc3..85438ae90a50a25f33830830aeaf714e2a670d73 100644 (file)
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -472,7 +472,7 @@ 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;