Bluetooth: Add support for SMP Invalid Parameters error code

The Invalid Parameters error code is used to indicate that the command
length is invalid or that a parameter is outside of the specified range.
This error code wasn't clearly specified in the Bluetooth 4.0
specification but since 4.1 this has been fixed.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index dfb4e11..b5b9263 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -663,7 +663,7 @@
 	BT_DBG("conn %p", conn);
 
 	if (skb->len < sizeof(*req))
-		return SMP_UNSPECIFIED;
+		return SMP_INVALID_PARAMS;
 
 	if (conn->hcon->link_mode & HCI_LM_MASTER)
 		return SMP_CMD_NOTSUPP;
@@ -720,7 +720,7 @@
 	BT_DBG("conn %p", conn);
 
 	if (skb->len < sizeof(*rsp))
-		return SMP_UNSPECIFIED;
+		return SMP_INVALID_PARAMS;
 
 	if (!(conn->hcon->link_mode & HCI_LM_MASTER))
 		return SMP_CMD_NOTSUPP;
@@ -770,7 +770,7 @@
 	BT_DBG("conn %p %s", conn, conn->hcon->out ? "master" : "slave");
 
 	if (skb->len < sizeof(smp->pcnf))
-		return SMP_UNSPECIFIED;
+		return SMP_INVALID_PARAMS;
 
 	memcpy(smp->pcnf, skb->data, sizeof(smp->pcnf));
 	skb_pull(skb, sizeof(smp->pcnf));
@@ -794,7 +794,7 @@
 	BT_DBG("conn %p", conn);
 
 	if (skb->len < sizeof(smp->rrnd))
-		return SMP_UNSPECIFIED;
+		return SMP_INVALID_PARAMS;
 
 	memcpy(smp->rrnd, skb->data, sizeof(smp->rrnd));
 	skb_pull(skb, sizeof(smp->rrnd));
@@ -836,7 +836,7 @@
 	BT_DBG("conn %p", conn);
 
 	if (skb->len < sizeof(*rp))
-		return SMP_UNSPECIFIED;
+		return SMP_INVALID_PARAMS;
 
 	if (!(conn->hcon->link_mode & HCI_LM_MASTER))
 		return SMP_CMD_NOTSUPP;
@@ -944,7 +944,7 @@
 	BT_DBG("conn %p", conn);
 
 	if (skb->len < sizeof(*rp))
-		return SMP_UNSPECIFIED;
+		return SMP_INVALID_PARAMS;
 
 	/* Ignore this PDU if it wasn't requested */
 	if (!(smp->remote_key_dist & SMP_DIST_ENC_KEY))
@@ -969,7 +969,7 @@
 	BT_DBG("conn %p", conn);
 
 	if (skb->len < sizeof(*rp))
-		return SMP_UNSPECIFIED;
+		return SMP_INVALID_PARAMS;
 
 	/* Ignore this PDU if it wasn't requested */
 	if (!(smp->remote_key_dist & SMP_DIST_ENC_KEY))
@@ -1001,7 +1001,7 @@
 	BT_DBG("");
 
 	if (skb->len < sizeof(*info))
-		return SMP_UNSPECIFIED;
+		return SMP_INVALID_PARAMS;
 
 	/* Ignore this PDU if it wasn't requested */
 	if (!(smp->remote_key_dist & SMP_DIST_ID_KEY))
@@ -1025,7 +1025,7 @@
 	BT_DBG("");
 
 	if (skb->len < sizeof(*info))
-		return SMP_UNSPECIFIED;
+		return SMP_INVALID_PARAMS;
 
 	/* Ignore this PDU if it wasn't requested */
 	if (!(smp->remote_key_dist & SMP_DIST_ID_KEY))
@@ -1075,7 +1075,7 @@
 	BT_DBG("conn %p", conn);
 
 	if (skb->len < sizeof(*rp))
-		return SMP_UNSPECIFIED;
+		return SMP_INVALID_PARAMS;
 
 	/* Ignore this PDU if it wasn't requested */
 	if (!(smp->remote_key_dist & SMP_DIST_SIGN))