diff --git a/drivers/thunderbolt/dma_test.c b/drivers/thunderbolt/dma_test.c
index c29cf620ee7d..58496f889d03 100644
--- a/drivers/thunderbolt/dma_test.c
+++ b/drivers/thunderbolt/dma_test.c
@@ -192,9 +192,9 @@ static int dma_test_start_rings(struct dma_test *dt)
 	}
 
 	ret = tb_xdomain_enable_paths(dt->xd, dt->tx_hopid,
-				      dt->tx_ring ? dt->tx_ring->hop : 0,
+				      dt->tx_ring ? dt->tx_ring->hop : -1,
 				      dt->rx_hopid,
-				      dt->rx_ring ? dt->rx_ring->hop : 0);
+				      dt->rx_ring ? dt->rx_ring->hop : -1);
 	if (ret) {
 		dma_test_free_rings(dt);
 		return ret;
@@ -218,9 +218,9 @@ static void dma_test_stop_rings(struct dma_test *dt)
 		tb_ring_stop(dt->tx_ring);
 
 	ret = tb_xdomain_disable_paths(dt->xd, dt->tx_hopid,
-				       dt->tx_ring ? dt->tx_ring->hop : 0,
+				       dt->tx_ring ? dt->tx_ring->hop : -1,
 				       dt->rx_hopid,
-				       dt->rx_ring ? dt->rx_ring->hop : 0);
+				       dt->rx_ring ? dt->rx_ring->hop : -1);
 	if (ret)
 		dev_warn(&dt->svc->dev, "failed to disable DMA paths\n");
 
diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c
index 565892a2cdb9..a979f47109e3 100644
--- a/drivers/thunderbolt/nhi.c
+++ b/drivers/thunderbolt/nhi.c
@@ -56,9 +56,14 @@ static int ring_interrupt_index(const struct tb_ring *ring)
 
 static void nhi_mask_interrupt(struct tb_nhi *nhi, int mask, int ring)
 {
-	if (nhi->quirks & QUIRK_AUTO_CLEAR_INT)
-		return;
-	iowrite32(mask, nhi->iobase + REG_RING_INTERRUPT_MASK_CLEAR_BASE + ring);
+	if (nhi->quirks & QUIRK_AUTO_CLEAR_INT) {
+		u32 val;
+
+		val = ioread32(nhi->iobase + REG_RING_INTERRUPT_BASE + ring);
+		iowrite32(val & ~mask, nhi->iobase + REG_RING_INTERRUPT_BASE + ring);
+	} else {
+		iowrite32(mask, nhi->iobase + REG_RING_INTERRUPT_MASK_CLEAR_BASE + ring);
+	}
 }
 
 static void nhi_clear_interrupt(struct tb_nhi *nhi, int ring)
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 7bfbc9ca9ba4..c1af712ca728 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -737,6 +737,7 @@ static void tb_scan_port(struct tb_port *port)
 {
 	struct tb_cm *tcm = tb_priv(port->sw->tb);
 	struct tb_port *upstream_port;
+	bool discovery = false;
 	struct tb_switch *sw;
 	int ret;
 
@@ -804,8 +805,10 @@ static void tb_scan_port(struct tb_port *port)
 	 * tunnels and know which switches were authorized already by
 	 * the boot firmware.
 	 */
-	if (!tcm->hotplug_active)
+	if (!tcm->hotplug_active) {
 		dev_set_uevent_suppress(&sw->dev, true);
+		discovery = true;
+	}
 
 	/*
 	 * At the moment Thunderbolt 2 and beyond (devices with LC) we
@@ -835,10 +838,14 @@ static void tb_scan_port(struct tb_port *port)
 	 * CL0s and CL1 are enabled and supported together.
 	 * Silently ignore CLx enabling in case CLx is not supported.
 	 */
-	ret = tb_switch_enable_clx(sw, TB_CL1);
-	if (ret && ret != -EOPNOTSUPP)
-		tb_sw_warn(sw, "failed to enable %s on upstream port\n",
-			   tb_switch_clx_name(TB_CL1));
+	if (discovery) {
+		tb_sw_dbg(sw, "discovery, not touching CL states\n");
+	} else {
+		ret = tb_switch_enable_clx(sw, TB_CL1);
+		if (ret && ret != -EOPNOTSUPP)
+			tb_sw_warn(sw, "failed to enable %s on upstream port\n",
+				   tb_switch_clx_name(TB_CL1));
+	}
 
 	if (tb_switch_is_clx_enabled(sw, TB_CL1))
 		/*
diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c
index 527fef43b2e9..7df5f90e21d4 100644
--- a/drivers/thunderbolt/tunnel.c
+++ b/drivers/thunderbolt/tunnel.c
@@ -531,7 +531,7 @@ static int tb_dp_xchg_caps(struct tb_tunnel *tunnel)
 	 * Perform connection manager handshake between IN and OUT ports
 	 * before capabilities exchange can take place.
 	 */
-	ret = tb_dp_cm_handshake(in, out, 1500);
+	ret = tb_dp_cm_handshake(in, out, 3000);
 	if (ret)
 		return ret;