[PATCH] [POWERPC] remove build warnings in windfarm_core

[Stephen Rothwell]

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 at canb.auug.org.au>
---
 drivers/macintosh/windfarm_core.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

On Tue, 15 May 2007 16:19:53 +1000 Paul Mackerras <paulus at samba.org> wrote:
>
> This shows up why I hate the must_check stuff.  The sysfs files are
> not essential for the operation of the windfarm subsystem.  If the
> sysfs registration fails for any reason, we now have a completely
> non-functional windfarm subsystem instead of a mostly-working one. :(

This version just warns.
-- 
Cheers,
Stephen Rothwell                    sfr at canb.auug.org.au

diff --git a/drivers/macintosh/windfarm_core.c b/drivers/macintosh/windfarm_core.c
index 192b26e..52a95b4 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_creat_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);
 
-- 
1.5.1.4