hwpoison-inject: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: linux-mm@kvack.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/mm/hwpoison-inject.c b/mm/hwpoison-inject.c
index 1a7497d015b29b4dcb7ed60a520278faa9ad5859..5b7430bd83a6533065e4cba76fb18665d172ef80 100644 (file)
--- a/mm/hwpoison-inject.c
+++ b/mm/hwpoison-inject.c
@@ -77,63 +77,40 @@ static void pfn_inject_exit(void)
 
 static int pfn_inject_init(void)
 {
-       struct dentry *dentry;
-
        hwpoison_dir = debugfs_create_dir("hwpoison", NULL);
-       if (hwpoison_dir == NULL)
-               return -ENOMEM;
 
        /*
         * Note that the below poison/unpoison interfaces do not involve
         * hardware status change, hence do not require hardware support.
         * They are mainly for testing hwpoison in software level.
         */
-       dentry = debugfs_create_file("corrupt-pfn", 0200, hwpoison_dir,
-                                         NULL, &hwpoison_fops);
-       if (!dentry)
-               goto fail;
-
-       dentry = debugfs_create_file("unpoison-pfn", 0200, hwpoison_dir,
-                                    NULL, &unpoison_fops);
-       if (!dentry)
-               goto fail;
-
-       dentry = debugfs_create_u32("corrupt-filter-enable", 0600,
-                                   hwpoison_dir, &hwpoison_filter_enable);
-       if (!dentry)
-               goto fail;
-
-       dentry = debugfs_create_u32("corrupt-filter-dev-major", 0600,
-                                   hwpoison_dir, &hwpoison_filter_dev_major);
-       if (!dentry)
-               goto fail;
-
-       dentry = debugfs_create_u32("corrupt-filter-dev-minor", 0600,
-                                   hwpoison_dir, &hwpoison_filter_dev_minor);
-       if (!dentry)
-               goto fail;
-
-       dentry = debugfs_create_u64("corrupt-filter-flags-mask", 0600,
-                                   hwpoison_dir, &hwpoison_filter_flags_mask);
-       if (!dentry)
-               goto fail;
-
-       dentry = debugfs_create_u64("corrupt-filter-flags-value", 0600,
-                                   hwpoison_dir, &hwpoison_filter_flags_value);
-       if (!dentry)
-               goto fail;
+       debugfs_create_file("corrupt-pfn", 0200, hwpoison_dir, NULL,
+                           &hwpoison_fops);
+
+       debugfs_create_file("unpoison-pfn", 0200, hwpoison_dir, NULL,
+                           &unpoison_fops);
+
+       debugfs_create_u32("corrupt-filter-enable", 0600, hwpoison_dir,
+                          &hwpoison_filter_enable);
+
+       debugfs_create_u32("corrupt-filter-dev-major", 0600, hwpoison_dir,
+                          &hwpoison_filter_dev_major);
+
+       debugfs_create_u32("corrupt-filter-dev-minor", 0600, hwpoison_dir,
+                          &hwpoison_filter_dev_minor);
+
+       debugfs_create_u64("corrupt-filter-flags-mask", 0600, hwpoison_dir,
+                          &hwpoison_filter_flags_mask);
+
+       debugfs_create_u64("corrupt-filter-flags-value", 0600, hwpoison_dir,
+                          &hwpoison_filter_flags_value);
 
 #ifdef CONFIG_MEMCG
-       dentry = debugfs_create_u64("corrupt-filter-memcg", 0600,
-                                   hwpoison_dir, &hwpoison_filter_memcg);
-       if (!dentry)
-               goto fail;
+       debugfs_create_u64("corrupt-filter-memcg", 0600, hwpoison_dir,
+                          &hwpoison_filter_memcg);
 #endif
 
        return 0;
-fail:
-       pfn_inject_exit();
-       return -ENOMEM;
 }
 
 module_init(pfn_inject_init);