Ass a comment explaining the slightly odd construct used to pass error values back. Cc: Jan Engelhardt <jengelh@linux01.gwdg.de> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
@@ -182,6 +182,10 @@ static struct dentry *gfs2_get_parent(struct dentry *child)
if (!inode)
return ERR_PTR(-ENOENT);
+ /*
+ * In case of an error, @inode carries the error value, and we
+ * have to return that as a(n invalid) pointer to dentry.
+ */
if (IS_ERR(inode))
return ERR_PTR(PTR_ERR(inode));