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>

diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 62e8c221d01ea10a5f105a0a44b2d2d8277d7878..c2e7b2657aeb31bf5ab50a4f8a8821e2ad53f696 100644 (file)
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -672,8 +672,10 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
        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);