if a character is not printable, print '?' instead of that.

Signed-off-by: Hyunchul Lee <cheol....@lge.com>
---
 fs/ubifs/debug.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 1e712a36..b14c06f 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -32,6 +32,7 @@
 #include <linux/math64.h>
 #include <linux/uaccess.h>
 #include <linux/random.h>
+#include <linux/ctype.h>
 #include "ubifs.h"
 
 static DEFINE_SPINLOCK(dbg_lock);
@@ -464,7 +465,8 @@ void ubifs_dump_node(const struct ubifs_info *c, const void 
*node)
                        pr_err("(bad name length, not printing, bad or 
corrupted node)");
                else {
                        for (i = 0; i < nlen && dent->name[i]; i++)
-                               pr_cont("%c", dent->name[i]);
+                               pr_cont("%c", isprint(dent->name[i]) ?
+                                       dent->name[i] : '?');
                }
                pr_cont("\n");
 
-- 
1.9.1

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