driver core: let dev_set_drvdata return int instead of void as it can fail

Before commit

	b402843 (Driver core: move dev_get/set_drvdata to drivers/base/dd.c)

calling dev_set_drvdata with dev=NULL was an unchecked error. After some
discussion about what to return in this case removing the check (and so
producing a null pointer exception) seems fine.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 7e9219b02796..e3a3eff1dacc 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -413,17 +413,16 @@ void *dev_get_drvdata(const struct device *dev)
 }
 EXPORT_SYMBOL(dev_get_drvdata);
 
-void dev_set_drvdata(struct device *dev, void *data)
+int dev_set_drvdata(struct device *dev, void *data)
 {
         int error;
 
-        if (!dev)
-                return;
         if (!dev->p) {
                 error = device_private_init(dev);
                 if (error)
-                        return;
+                        return error;
         }
         dev->p->driver_data = data;
+        return 0;
 }
 EXPORT_SYMBOL(dev_set_drvdata);