wireless: hostap: proc: print properly escaped SSID

Instead of substituting non-printable characters by '_' let's print SSID
properly escaped by using recently added %*pE specifier.

[akpm@linux-foundation.org: fix printk type warning]
[akpm@linux-foundation.org: remove now-unused local `i']
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: "John W . Linville" <linville@tuxdriver.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/net/wireless/hostap/hostap_proc.c

@@ -168,7 +168,6 @@ static int prism2_bss_list_proc_show(struct seq_file *m, void *v)
 	local_info_t *local = m->private;
 	struct list_head *ptr = v;
 	struct hostap_bss_info *bss;
-	int i;
 
 	if (ptr == &local->bss_list) {
 		seq_printf(m, "#BSSID\tlast_update\tcount\tcapab_info\tSSID(txt)\t"
@@ -181,9 +180,7 @@ static int prism2_bss_list_proc_show(struct seq_file *m, void *v)
 		   bss->bssid, bss->last_update,
 		   bss->count, bss->capab_info);
 
-	for (i = 0; i < bss->ssid_len; i++)
-		seq_putc(m,bss->ssid[i] >= 32 && bss->ssid[i] < 127 ?
-			   bss->ssid[i] : '_');
+	seq_printf(m, "%*pE", (int)bss->ssid_len, bss->ssid);
 
 	seq_putc(m, '\t');
 	seq_printf(m, "%*phN", (int)bss->ssid_len, bss->ssid);