[POWERPC] cell: catch errors from sysfs_create_group()

We're currently getting a warning from not checking the result of
sysfs_create_group, which is declared as __must_check.

This change introduces appropriate error-handling for
spu_add_sysdev_attr_group()

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index ee37e0e39b6b366767b87b6a82a8d451ef58d059..f73263ba98412e97ad73f2e679001354940a22f2 100644 (file)
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -574,13 +574,27 @@ EXPORT_SYMBOL_GPL(spu_add_sysdev_attr);
 int spu_add_sysdev_attr_group(struct attribute_group *attrs)
 {
        struct spu *spu;
+       int rc = 0;
 
        mutex_lock(&spu_full_list_mutex);
-       list_for_each_entry(spu, &spu_full_list, full_list)
-               sysfs_create_group(&spu->sysdev.kobj, attrs);
+       list_for_each_entry(spu, &spu_full_list, full_list) {
+               rc = sysfs_create_group(&spu->sysdev.kobj, attrs);
+
+               /* we're in trouble here, but try unwinding anyway */
+               if (rc) {
+                       printk(KERN_ERR "%s: can't create sysfs group '%s'\n",
+                                       __func__, attrs->name);
+
+                       list_for_each_entry_continue_reverse(spu,
+                                       &spu_full_list, full_list)
+                               sysfs_remove_group(&spu->sysdev.kobj, attrs);
+                       break;
+               }
+       }
+
        mutex_unlock(&spu_full_list_mutex);
 
-       return 0;
+       return rc;
 }
 EXPORT_SYMBOL_GPL(spu_add_sysdev_attr_group);