[POWERPC] Remove build warnings in windfarm_core

drivers/macintosh/windfarm_core.c: In function 'wf_register_control':
drivers/macintosh/windfarm_core.c:219: warning: ignoring return value of 'device_create_file', declared with attribute warn_unused_result
drivers/macintosh/windfarm_core.c: In function 'wf_register_sensor':
drivers/macintosh/windfarm_core.c:329: warning: ignoring return value of 'device_create_file', declared with attribute warn_unused_result

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/macintosh/windfarm_core.c b/drivers/macintosh/windfarm_core.c
index 192b26e97777..11ced17f438a 100644
--- a/drivers/macintosh/windfarm_core.c
+++ b/drivers/macintosh/windfarm_core.c
@@ -216,7 +216,10 @@ int wf_register_control(struct wf_control *new_ct)
         new_ct->attr.attr.mode = 0644;
         new_ct->attr.show = wf_show_control;
         new_ct->attr.store = wf_store_control;
-        device_create_file(&wf_platform_device.dev, &new_ct->attr);
+        if (device_create_file(&wf_platform_device.dev, &new_ct->attr))
+                printk(KERN_WARNING "windfarm: device_create_file failed"
+                        " for %s\n", new_ct->name);
+                /* the subsystem still does useful work without the file */
 
         DBG("wf: Registered control %s\n", new_ct->name);
 
@@ -326,7 +329,10 @@ int wf_register_sensor(struct wf_sensor *new_sr)
         new_sr->attr.attr.mode = 0444;
         new_sr->attr.show = wf_show_sensor;
         new_sr->attr.store = NULL;
-        device_create_file(&wf_platform_device.dev, &new_sr->attr);
+        if (device_create_file(&wf_platform_device.dev, &new_sr->attr))
+                printk(KERN_WARNING "windfarm: device_create_file failed"
+                        " for %s\n", new_sr->name);
+                /* the subsystem still does useful work without the file */
 
         DBG("wf: Registered sensor %s\n", new_sr->name);