diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 059a3da08ad7..13b40e8af95e 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -32,6 +32,18 @@
 #include "ecc.h"
 #include "smp.h"
 
+/* Low-level debug macros to be used for stuff that we don't want
+ * accidentially in dmesg, i.e. the values of the various crypto keys
+ * and the inputs & outputs of crypto functions.
+ */
+#ifdef DEBUG
+#define SMP_DBG(fmt, ...) printk(KERN_DEBUG "%s: " fmt, __func__, \
+				 ##__VA_ARGS__)
+#else
+#define SMP_DBG(fmt, ...) no_printk(KERN_DEBUG "%s: " fmt, __func__, \
+				    ##__VA_ARGS__)
+#endif
+
 #define SMP_ALLOW_CMD(smp, code)	set_bit(code, &smp->allow_cmd)
 
 /* Keys which are not distributed with Secure Connections */
@@ -154,8 +166,8 @@ static int aes_cmac(struct crypto_hash *tfm, const u8 k[16], const u8 *m,
 	swap_buf(k, tmp, 16);
 	swap_buf(m, msg_msb, len);
 
-	BT_DBG("msg (len %zu) %*phN", len, (int) len, m);
-	BT_DBG("key %16phN", k);
+	SMP_DBG("msg (len %zu) %*phN", len, (int) len, m);
+	SMP_DBG("key %16phN", k);
 
 	err = crypto_hash_setkey(tfm, tmp, 16);
 	if (err) {
@@ -179,7 +191,7 @@ static int aes_cmac(struct crypto_hash *tfm, const u8 k[16], const u8 *m,
 
 	swap_buf(mac_msb, mac, 16);
 
-	BT_DBG("mac %16phN", mac);
+	SMP_DBG("mac %16phN", mac);
 
 	return 0;
 }
@@ -190,9 +202,9 @@ static int smp_f4(struct crypto_hash *tfm_cmac, const u8 u[32], const u8 v[32],
 	u8 m[65];
 	int err;
 
-	BT_DBG("u %32phN", u);
-	BT_DBG("v %32phN", v);
-	BT_DBG("x %16phN z %02x", x, z);
+	SMP_DBG("u %32phN", u);
+	SMP_DBG("v %32phN", v);
+	SMP_DBG("x %16phN z %02x", x, z);
 
 	m[0] = z;
 	memcpy(m + 1, v, 32);
@@ -202,7 +214,7 @@ static int smp_f4(struct crypto_hash *tfm_cmac, const u8 u[32], const u8 v[32],
 	if (err)
 		return err;
 
-	BT_DBG("res %16phN", res);
+	SMP_DBG("res %16phN", res);
 
 	return err;
 }
@@ -223,15 +235,15 @@ static int smp_f5(struct crypto_hash *tfm_cmac, u8 w[32], u8 n1[16], u8 n2[16],
 	u8 m[53], t[16];
 	int err;
 
-	BT_DBG("w %32phN", w);
-	BT_DBG("n1 %16phN n2 %16phN", n1, n2);
-	BT_DBG("a1 %7phN a2 %7phN", a1, a2);
+	SMP_DBG("w %32phN", w);
+	SMP_DBG("n1 %16phN n2 %16phN", n1, n2);
+	SMP_DBG("a1 %7phN a2 %7phN", a1, a2);
 
 	err = aes_cmac(tfm_cmac, salt, w, 32, t);
 	if (err)
 		return err;
 
-	BT_DBG("t %16phN", t);
+	SMP_DBG("t %16phN", t);
 
 	memcpy(m, length, 2);
 	memcpy(m + 2, a2, 7);
@@ -246,7 +258,7 @@ static int smp_f5(struct crypto_hash *tfm_cmac, u8 w[32], u8 n1[16], u8 n2[16],
 	if (err)
 		return err;
 
-	BT_DBG("mackey %16phN", mackey);
+	SMP_DBG("mackey %16phN", mackey);
 
 	m[52] = 1; /* Counter */
 
@@ -254,7 +266,7 @@ static int smp_f5(struct crypto_hash *tfm_cmac, u8 w[32], u8 n1[16], u8 n2[16],
 	if (err)
 		return err;
 
-	BT_DBG("ltk %16phN", ltk);
+	SMP_DBG("ltk %16phN", ltk);
 
 	return 0;
 }
@@ -267,9 +279,9 @@ static int smp_f6(struct crypto_hash *tfm_cmac, const u8 w[16],
 	u8 m[65];
 	int err;
 
-	BT_DBG("w %16phN", w);
-	BT_DBG("n1 %16phN n2 %16phN", n1, n2);
-	BT_DBG("r %16phN io_cap %3phN a1 %7phN a2 %7phN", r, io_cap, a1, a2);
+	SMP_DBG("w %16phN", w);
+	SMP_DBG("n1 %16phN n2 %16phN", n1, n2);
+	SMP_DBG("r %16phN io_cap %3phN a1 %7phN a2 %7phN", r, io_cap, a1, a2);
 
 	memcpy(m, a2, 7);
 	memcpy(m + 7, a1, 7);
@@ -293,9 +305,9 @@ static int smp_g2(struct crypto_hash *tfm_cmac, const u8 u[32], const u8 v[32],
 	u8 m[80], tmp[16];
 	int err;
 
-	BT_DBG("u %32phN", u);
-	BT_DBG("v %32phN", v);
-	BT_DBG("x %16phN y %16phN", x, y);
+	SMP_DBG("u %32phN", u);
+	SMP_DBG("v %32phN", v);
+	SMP_DBG("x %16phN y %16phN", x, y);
 
 	memcpy(m, y, 16);
 	memcpy(m + 16, v, 32);
@@ -308,7 +320,7 @@ static int smp_g2(struct crypto_hash *tfm_cmac, const u8 u[32], const u8 v[32],
 	*val = get_unaligned_le32(tmp);
 	*val %= 1000000;
 
-	BT_DBG("val %06u", *val);
+	SMP_DBG("val %06u", *val);
 
 	return 0;
 }
@@ -357,13 +369,13 @@ static int smp_h6(struct crypto_hash *tfm_cmac, const u8 w[16],
 {
 	int err;
 
-	BT_DBG("w %16phN key_id %4phN", w, key_id);
+	SMP_DBG("w %16phN key_id %4phN", w, key_id);
 
 	err = aes_cmac(tfm_cmac, w, key_id, 4, res);
 	if (err)
 		return err;
 
-	BT_DBG("res %16phN", res);
+	SMP_DBG("res %16phN", res);
 
 	return err;
 }
@@ -1742,9 +1754,9 @@ static u8 sc_send_public_key(struct smp_chan *smp)
 		}
 	}
 
-	BT_DBG("Local Public Key X: %32phN", smp->local_pk);
-	BT_DBG("Local Public Key Y: %32phN", &smp->local_pk[32]);
-	BT_DBG("Local Private Key:  %32phN", smp->local_sk);
+	SMP_DBG("Local Public Key X: %32phN", smp->local_pk);
+	SMP_DBG("Local Public Key Y: %32phN", &smp->local_pk[32]);
+	SMP_DBG("Local Private Key:  %32phN", smp->local_sk);
 
 	smp_send_cmd(smp->conn, SMP_CMD_PUBLIC_KEY, 64, smp->local_pk);
 
@@ -2390,13 +2402,13 @@ static int smp_cmd_public_key(struct l2cap_conn *conn, struct sk_buff *skb)
 			return err;
 	}
 
-	BT_DBG("Remote Public Key X: %32phN", smp->remote_pk);
-	BT_DBG("Remote Public Key Y: %32phN", &smp->remote_pk[32]);
+	SMP_DBG("Remote Public Key X: %32phN", smp->remote_pk);
+	SMP_DBG("Remote Public Key Y: %32phN", &smp->remote_pk[32]);
 
 	if (!ecdh_shared_secret(smp->remote_pk, smp->local_sk, smp->dhkey))
 		return SMP_UNSPECIFIED;
 
-	BT_DBG("DHKey %32phN", smp->dhkey);
+	SMP_DBG("DHKey %32phN", smp->dhkey);
 
 	set_bit(SMP_FLAG_REMOTE_PK, &smp->flags);