commit a80e1053aaa395d94fff5ab7c73c89bb0c28c3c5
author Prarit Bhargava <prarit@redhat.com> Thu Oct 03 19:23:36 2013 -0400
committer Matthew Garrett <matthew.garrett@nebula.com> Wed Nov 20 20:16:22 2013 -0500
tree 7e71fecd4b28edf04ba16f19d60009199bd54881
parent ed12f295bfd5c378970106891f12999589aec4e5

x86, wmi fix modalias_show return values

I just fixed this same bug in arch/powerpc/kernel/vio.c and took a quick
look for other similar errors in the kernel.

modalias_show() should return an empty string on error, not errno.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>

drivers/platform/x86/wmi.c

diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 62e8c22..c2e7b26 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -672,8 +672,10 @@
 	struct wmi_block *wblock;
 
 	wblock = dev_get_drvdata(dev);
-	if (!wblock)
-		return -ENOMEM;
+	if (!wblock) {
+		strcat(buf, "\n");
+		return strlen(buf);
+	}
 
 	wmi_gtoa(wblock->gblock.guid, guid_string);