[PATCH 4.4 028/101] spi: No need to assign dummy value in spi_unregister_controller()

[Greg Kroah-Hartman]

From: Andy Shevchenko <andriy.shevche...@linux.intel.com>

[ 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 ‘spi_unregister_controller’:
drivers/spi/spi.c:2480:6: warning: variable ‘dummy’ set but not used 
[-Wunused-but-set-variable]
  int dummy;
      ^~~~~

Signed-off-by: Andy Shevchenko <andriy.shevche...@linux.intel.com>
Signed-off-by: Mark Brown <broo...@kernel.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/spi/spi.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index c132c676df3a..e5460d84ed08 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1917,8 +1917,6 @@ static int __unregister(struct device *dev, void *null)
  */
 void spi_unregister_master(struct spi_master *master)
 {
-       int dummy;
-
        if (master->queued) {
                if (spi_destroy_queue(master))
                        dev_err(&master->dev, "queue remove failed\n");
@@ -1928,7 +1926,7 @@ void spi_unregister_master(struct spi_master *master)
        list_del(&master->list);
        mutex_unlock(&board_lock);
 
-       dummy = device_for_each_child(&master->dev, NULL, __unregister);
+       device_for_each_child(&master->dev, NULL, __unregister);
        device_unregister(&master->dev);
 }
 EXPORT_SYMBOL_GPL(spi_unregister_master);
-- 
2.25.1