[PATCH 4.14 045/190] spi: No need to assign dummy value in spi_unregister_controller()

[Greg Kroah-Hartman]

From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>

[ Upstream commit ebc37af5e0a134355ea2b62ed4141458bdbd5389 ]

The device_for_each_child() doesn't require the returned value to be checked.
Thus, drop the dummy variable completely and have no warning anymore:

drivers/spi/spi.c: In function âspi_unregister_controllerâ:
drivers/spi/spi.c:2480:6: warning: variable âdummyâ set but not used [-Wunused-but-set-variable]
  int dummy;
      ^~~~~

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/spi/spi.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 56035637d8f6..8cc1b21d00d3 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -2264,7 +2264,6 @@ void spi_unregister_controller(struct spi_controller *ctlr)
 {
 	struct spi_controller *found;
 	int id = ctlr->bus_num;
-	int dummy;
 
 	/* First make sure that this controller was ever added */
 	mutex_lock(&board_lock);
@@ -2278,7 +2277,7 @@ void spi_unregister_controller(struct spi_controller *ctlr)
 	list_del(&ctlr->list);
 	mutex_unlock(&board_lock);
 
-	dummy = device_for_each_child(&ctlr->dev, NULL, __unregister);
+	device_for_each_child(&ctlr->dev, NULL, __unregister);
 	device_unregister(&ctlr->dev);
 	/* free bus id */
 	mutex_lock(&board_lock);
-- 
2.25.1