[PATCH] wimax: debug: fix a missing-check bug in d_parse_params()

[Gen Zhang]

In d_parse_params(), 'params_orig' is allocated by kstrdup(). It returns
NULL when fails. So 'params_orig' should be checked.

Signed-off-by: Gen Zhang <blackgod016...@gmail.com>
---
diff --git a/include/linux/wimax/debug.h b/include/linux/wimax/debug.h
index aaf24ba..bacd6cb 100644
--- a/include/linux/wimax/debug.h
+++ b/include/linux/wimax/debug.h
@@ -496,6 +496,11 @@ void d_parse_params(struct d_level *d_level, size_t 
d_level_size,
        if (_params == NULL)
                return;
        params_orig = kstrdup(_params, GFP_KERNEL);
+       if (!params_orig) {
+               printk(KERN_ERR "%s: can't duplicate string '%s'\n",
+                      tag, _params);
+               return;
+       }
        params = params_orig;
        while (1) {
                token = strsep(&params, " ");