diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c
index 0f795ea58756..698fb124d529 100644
--- a/drivers/thunderbolt/nhi.c
+++ b/drivers/thunderbolt/nhi.c
@@ -1235,6 +1235,8 @@ int nhi_probe(struct tb_nhi *nhi)
 
 	init_completion(&nhi->domain_released);
 
+	nhi->host_reset = host_reset;
+
 	res = tb_domain_add(tb, host_reset);
 	if (res) {
 		/*
diff --git a/drivers/thunderbolt/pci.c b/drivers/thunderbolt/pci.c
index bbd186c29ef7..dbb6badda867 100644
--- a/drivers/thunderbolt/pci.c
+++ b/drivers/thunderbolt/pci.c
@@ -230,7 +230,7 @@ static void nhi_pci_ring_release_msix(struct tb_ring *ring)
 	ring->irq = 0;
 }
 
-static void nhi_pci_shutdown(struct tb_nhi *nhi)
+static void nhi_pci_release_irq(struct tb_nhi *nhi)
 {
 	struct tb_nhi_pci *nhi_pci = nhi_to_pci(nhi);
 	struct pci_dev *pdev = to_pci_dev(nhi->dev);
@@ -256,7 +256,7 @@ static const struct tb_nhi_ops pci_nhi_default_ops = {
 	.post_nvm_auth = nhi_pci_complete_dma_port,
 	.request_ring_irq = nhi_pci_ring_request_msix,
 	.release_ring_irq = nhi_pci_ring_release_msix,
-	.shutdown = nhi_pci_shutdown,
+	.shutdown = nhi_pci_release_irq,
 	.is_present = nhi_pci_is_present,
 	.init_interrupts = nhi_pci_init_msi,
 };
@@ -424,7 +424,7 @@ static int icl_nhi_resume(struct tb_nhi *nhi)
 
 static void icl_nhi_shutdown(struct tb_nhi *nhi)
 {
-	nhi_pci_shutdown(nhi);
+	nhi_pci_release_irq(nhi);
 
 	icl_nhi_force_power(nhi, false);
 }
@@ -479,11 +479,19 @@ static int nhi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	return nhi_probe(&nhi_pci->nhi);
 }
 
-static void nhi_pci_remove(struct pci_dev *pdev)
+static void nhi_pci_do_remove(struct pci_dev *pdev, bool reset)
 {
 	struct tb *tb = pci_get_drvdata(pdev);
 	struct tb_nhi *nhi = tb->nhi;
 
+	/*
+	 * On system shutdown/reboot force a host router reset so the
+	 * connection manager asserts DPR on connected Thunderbolt 3 devices
+	 * before the router tree is removed (see tb_stop()).
+	 */
+	if (reset)
+		nhi->host_reset = true;
+
 	pm_runtime_get_sync(&pdev->dev);
 	pm_runtime_dont_use_autosuspend(&pdev->dev);
 	pm_runtime_forbid(&pdev->dev);
@@ -493,6 +501,16 @@ static void nhi_pci_remove(struct pci_dev *pdev)
 	nhi_shutdown(nhi);
 }
 
+static void nhi_pci_remove(struct pci_dev *pdev)
+{
+	nhi_pci_do_remove(pdev, false);
+}
+
+static void nhi_pci_shutdown(struct pci_dev *pdev)
+{
+	nhi_pci_do_remove(pdev, true);
+}
+
 static struct pci_device_id nhi_ids[] = {
 	/*
 	 * We have to specify class, the TB bridges use the same device and
@@ -593,7 +611,7 @@ static struct pci_driver nhi_driver = {
 	.id_table = nhi_ids,
 	.probe = nhi_pci_probe,
 	.remove = nhi_pci_remove,
-	.shutdown = nhi_pci_remove,
+	.shutdown = nhi_pci_shutdown,
 	.driver.pm = &nhi_pm_ops,
 };
 
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index a830c82bb905..404c0693df50 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -682,7 +682,16 @@ int tb_port_disable(struct tb_port *port)
 	return __tb_port_enable(port, false);
 }
 
-static int tb_port_reset(struct tb_port *port)
+/**
+ * tb_port_reset() - Reset the port
+ * @port: Port to reset
+ *
+ * Resets @port. For USB4 ports this issues a USB4 port reset and for
+ * legacy ports the link controller port is reset.
+ *
+ * Return: %0 on success, negative errno otherwise.
+ */
+int tb_port_reset(struct tb_port *port)
 {
 	if (tb_switch_is_usb4(port->sw))
 		return port->cap_usb4 ? usb4_port_reset(port) : 0;
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 76323255439a..b7cc6894a598 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -2941,7 +2941,9 @@ static void tb_handle_event(struct tb *tb, enum tb_cfg_pkg_type type,
 static void tb_stop(struct tb *tb)
 {
 	struct tb_cm *tcm = tb_priv(tb);
+	struct tb_nhi *nhi = tb->nhi;
 	struct tb_tunnel *tunnel;
+	struct tb_port *port;
 	struct tb_tunnel *n;
 
 	cancel_delayed_work(&tcm->remove_work);
@@ -2956,6 +2958,25 @@ static void tb_stop(struct tb *tb)
 			tb_tunnel_deactivate(tunnel);
 		tb_tunnel_put(tunnel);
 	}
+	/*
+	 * Signal disconnect to connected devices before the router tree is
+	 * removed below. A Thunderbolt 3 device directly connected to a USB4
+	 * host otherwise never receives a disconnect indication, leaving
+	 * firmware to poll the dead link for up to ~60 s which on some
+	 * platforms turns the shutdown into a warm reset. Asserting
+	 * PORT_CS_19.DPR drives SBTX low (USB4 spec section 6.9) so the device
+	 * detects SBRX low and goes to Uninitialized Unplugged immediately.
+	 */
+	if (nhi->host_reset) {
+		tb_switch_for_each_port(tb->root_switch, port) {
+			if (!tb_port_is_null(port) || !tb_port_has_remote(port))
+				continue;
+			if (tb_switch_is_usb4(port->remote->sw))
+				continue;
+			if (tb_port_reset(port))
+				tb_port_dbg(port, "downstream port reset failed, continuing\n");
+		}
+	}
 	tb_switch_remove(tb->root_switch);
 	tb->root_switch = NULL;
 	tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index ec9192b61bc0..4373336d9425 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -1103,6 +1103,7 @@ int tb_port_clear_counter(struct tb_port *port, int counter);
 int tb_port_unlock(struct tb_port *port);
 int tb_port_enable(struct tb_port *port);
 int tb_port_disable(struct tb_port *port);
+int tb_port_reset(struct tb_port *port);
 int tb_port_alloc_in_hopid(struct tb_port *port, int hopid, int max_hopid);
 void tb_port_release_in_hopid(struct tb_port *port, int hopid);
 int tb_port_alloc_out_hopid(struct tb_port *port, int hopid, int max_hopid);
diff --git a/include/linux/thunderbolt.h b/include/linux/thunderbolt.h
index feb1af175cfd..cb1621c6b703 100644
--- a/include/linux/thunderbolt.h
+++ b/include/linux/thunderbolt.h
@@ -514,6 +514,11 @@ void tb_service_properties_changed(struct tb_service *svc);
  * @hop_count: Number of rings (end point hops) supported by NHI.
  * @quirks: NHI specific quirks if any
  * @domain_released: Completed when domain has been fully released
+ * @host_reset: Host router was reset on driver load, or forced on system
+ *		shutdown/reboot. When set, tb_stop() asserts DPR on connected
+ *		downstream ports to signal disconnect before tearing down the
+ *		router tree. Only Thunderbolt 3 devices are reset; USB4
+ *		routers are skipped.
  */
 struct tb_nhi {
 	spinlock_t lock;
@@ -528,6 +533,7 @@ struct tb_nhi {
 	u32 hop_count;
 	unsigned long quirks;
 	struct completion domain_released;
+	bool host_reset;
 };
 
 /**