Merge tag 'usb-6.9-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB driver fixes from Greg KH:
 "Here are some small USB driver fixes for reported problems for
  6.9-rc7. Included in here are:

   - usb core fixes for found issues

   - typec driver fixes for reported problems

   - usb gadget driver fixes for reported problems

   - xhci build fixes

   - dwc3 driver fixes for reported issues

  All of these have been in linux-next this past week with no reported
  problems"

* tag 'usb-6.9-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: typec: tcpm: Check for port partner validity before consuming it
  usb: typec: tcpm: enforce ready state when queueing alt mode vdm
  usb: typec: tcpm: unregister existing source caps before re-registration
  usb: typec: tcpm: clear pd_event queue in PORT_RESET
  usb: typec: tcpm: queue correct sop type in tcpm_queue_vdm_unlocked
  usb: Fix regression caused by invalid ep0 maxpacket in virtual SuperSpeed device
  usb: ohci: Prevent missed ohci interrupts
  usb: typec: qcom-pmic: fix pdphy start() error handling
  usb: typec: qcom-pmic: fix use-after-free on late probe errors
  usb: gadget: f_fs: Fix a race condition when processing setup packets.
  USB: core: Fix access violation during port device removal
  usb: dwc3: core: Prevent phy suspend during init
  usb: xhci-plat: Don't include xhci.h
  usb: gadget: uvc: use correct buffer size when parsing configfs lists
  usb: gadget: composite: fix OS descriptors w_value logic
  usb: gadget: f_fs: Fix race between aio_cancel() and AIO request complete

drivers/usb/core/hub.c

@@ -5110,9 +5110,10 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1,
 	}
 	if (usb_endpoint_maxp(&udev->ep0.desc) == i) {
 		;	/* Initial ep0 maxpacket guess is right */
-	} else if ((udev->speed == USB_SPEED_FULL ||
+	} else if (((udev->speed == USB_SPEED_FULL ||
 				udev->speed == USB_SPEED_HIGH) &&
-			(i == 8 || i == 16 || i == 32 || i == 64)) {
+			(i == 8 || i == 16 || i == 32 || i == 64)) ||
+			(udev->speed >= USB_SPEED_SUPER && i > 0)) {
 		/* Initial guess is wrong; use the descriptor's value */
 		if (udev->speed == USB_SPEED_FULL)
 			dev_dbg(&udev->dev, "ep0 maxpacket = %d\n", i);

drivers/usb/core/port.c

@@ -51,13 +51,15 @@ static ssize_t disable_show(struct device *dev,
 	struct usb_port *port_dev = to_usb_port(dev);
 	struct usb_device *hdev = to_usb_device(dev->parent->parent);
 	struct usb_hub *hub = usb_hub_to_struct_hub(hdev);
-	struct usb_interface *intf = to_usb_interface(hub->intfdev);
+	struct usb_interface *intf = to_usb_interface(dev->parent);
 	int port1 = port_dev->portnum;
 	u16 portstatus, unused;
 	bool disabled;
 	int rc;
 	struct kernfs_node *kn;
 
+	if (!hub)
+		return -ENODEV;
 	hub_get(hub);
 	rc = usb_autopm_get_interface(intf);
 	if (rc < 0)
@@ -101,12 +103,14 @@ static ssize_t disable_store(struct device *dev, struct device_attribute *attr,
 	struct usb_port *port_dev = to_usb_port(dev);
 	struct usb_device *hdev = to_usb_device(dev->parent->parent);
 	struct usb_hub *hub = usb_hub_to_struct_hub(hdev);
-	struct usb_interface *intf = to_usb_interface(hub->intfdev);
+	struct usb_interface *intf = to_usb_interface(dev->parent);
 	int port1 = port_dev->portnum;
 	bool disabled;
 	int rc;
 	struct kernfs_node *kn;
 
+	if (!hub)
+		return -ENODEV;
 	rc = kstrtobool(buf, &disabled);
 	if (rc)
 		return rc;

drivers/usb/dwc3/core.c

@@ -104,6 +104,27 @@ static int dwc3_get_dr_mode(struct dwc3 *dwc)
 	return 0;
 }
 
+void dwc3_enable_susphy(struct dwc3 *dwc, bool enable)
+{
+	u32 reg;
+
+	reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
+	if (enable && !dwc->dis_u3_susphy_quirk)
+		reg |= DWC3_GUSB3PIPECTL_SUSPHY;
+	else
+		reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
+
+	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
+
+	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
+	if (enable && !dwc->dis_u2_susphy_quirk)
+		reg |= DWC3_GUSB2PHYCFG_SUSPHY;
+	else
+		reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
+
+	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+}
+
 void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode)
 {
 	u32 reg;
@@ -585,11 +606,8 @@ static int dwc3_core_ulpi_init(struct dwc3 *dwc)
  */
 static int dwc3_phy_setup(struct dwc3 *dwc)
 {
-	unsigned int hw_mode;
 	u32 reg;
 
-	hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
-
 	reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
 
 	/*
@@ -599,21 +617,16 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
 	reg &= ~DWC3_GUSB3PIPECTL_UX_EXIT_PX;
 
 	/*
-	 * Above 1.94a, it is recommended to set DWC3_GUSB3PIPECTL_SUSPHY
-	 * to '0' during coreConsultant configuration. So default value
-	 * will be '0' when the core is reset. Application needs to set it
-	 * to '1' after the core initialization is completed.
-	 */
-	if (!DWC3_VER_IS_WITHIN(DWC3, ANY, 194A))
-		reg |= DWC3_GUSB3PIPECTL_SUSPHY;
-
-	/*
-	 * For DRD controllers, GUSB3PIPECTL.SUSPENDENABLE must be cleared after
-	 * power-on reset, and it can be set after core initialization, which is
-	 * after device soft-reset during initialization.
+	 * Above DWC_usb3.0 1.94a, it is recommended to set
+	 * DWC3_GUSB3PIPECTL_SUSPHY to '0' during coreConsultant configuration.
+	 * So default value will be '0' when the core is reset. Application
+	 * needs to set it to '1' after the core initialization is completed.
+	 *
+	 * Similarly for DRD controllers, GUSB3PIPECTL.SUSPENDENABLE must be
+	 * cleared after power-on reset, and it can be set after core
+	 * initialization.
 	 */
-	if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD)
-		reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
+	reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
 
 	if (dwc->u2ss_inp3_quirk)
 		reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK;
@@ -639,9 +652,6 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
 	if (dwc->tx_de_emphasis_quirk)
 		reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc->tx_de_emphasis);
 
-	if (dwc->dis_u3_susphy_quirk)
-		reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
-
 	if (dwc->dis_del_phy_power_chg_quirk)
 		reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE;
 
@@ -689,24 +699,15 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
 	}
 
 	/*
-	 * Above 1.94a, it is recommended to set DWC3_GUSB2PHYCFG_SUSPHY to
-	 * '0' during coreConsultant configuration. So default value will
-	 * be '0' when the core is reset. Application needs to set it to
-	 * '1' after the core initialization is completed.
-	 */
-	if (!DWC3_VER_IS_WITHIN(DWC3, ANY, 194A))
-		reg |= DWC3_GUSB2PHYCFG_SUSPHY;
-
-	/*
-	 * For DRD controllers, GUSB2PHYCFG.SUSPHY must be cleared after
-	 * power-on reset, and it can be set after core initialization, which is
-	 * after device soft-reset during initialization.
+	 * Above DWC_usb3.0 1.94a, it is recommended to set
+	 * DWC3_GUSB2PHYCFG_SUSPHY to '0' during coreConsultant configuration.
+	 * So default value will be '0' when the core is reset. Application
+	 * needs to set it to '1' after the core initialization is completed.
+	 *
+	 * Similarly for DRD controllers, GUSB2PHYCFG.SUSPHY must be cleared
+	 * after power-on reset, and it can be set after core initialization.
 	 */
-	if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD)
-		reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
-
-	if (dwc->dis_u2_susphy_quirk)
-		reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
+	reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
 
 	if (dwc->dis_enblslpm_quirk)
 		reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
@@ -1227,21 +1228,6 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	if (ret)
 		goto err_exit_phy;
 
-	if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD &&
-	    !DWC3_VER_IS_WITHIN(DWC3, ANY, 194A)) {
-		if (!dwc->dis_u3_susphy_quirk) {
-			reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
-			reg |= DWC3_GUSB3PIPECTL_SUSPHY;
-			dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
-		}
-
-		if (!dwc->dis_u2_susphy_quirk) {
-			reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
-			reg |= DWC3_GUSB2PHYCFG_SUSPHY;
-			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
-		}
-	}
-
 	dwc3_core_setup_global_control(dwc);
 	dwc3_core_num_eps(dwc);
 

drivers/usb/dwc3/core.h

@@ -1580,6 +1580,7 @@ int dwc3_event_buffers_setup(struct dwc3 *dwc);
 void dwc3_event_buffers_cleanup(struct dwc3 *dwc);
 
 int dwc3_core_soft_reset(struct dwc3 *dwc);
+void dwc3_enable_susphy(struct dwc3 *dwc, bool enable);
 
 #if IS_ENABLED(CONFIG_USB_DWC3_HOST) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
 int dwc3_host_init(struct dwc3 *dwc);

drivers/usb/dwc3/gadget.c

@@ -2924,6 +2924,7 @@ static int __dwc3_gadget_start(struct dwc3 *dwc)
 	dwc3_ep0_out_start(dwc);
 
 	dwc3_gadget_enable_irq(dwc);
+	dwc3_enable_susphy(dwc, true);
 
 	return 0;
 
@@ -4690,6 +4691,7 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
 	if (!dwc->gadget)
 		return;
 
+	dwc3_enable_susphy(dwc, false);
 	usb_del_gadget(dwc->gadget);
 	dwc3_gadget_free_endpoints(dwc);
 	usb_put_gadget(dwc->gadget);

drivers/usb/dwc3/host.c

@@ -10,10 +10,13 @@
 #include <linux/irq.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
 
 #include "../host/xhci-port.h"
 #include "../host/xhci-ext-caps.h"
 #include "../host/xhci-caps.h"
+#include "../host/xhci-plat.h"
 #include "core.h"
 
 #define XHCI_HCSPARAMS1		0x4
@@ -57,6 +60,24 @@ static void dwc3_power_off_all_roothub_ports(struct dwc3 *dwc)
 	}
 }
 
+static void dwc3_xhci_plat_start(struct usb_hcd *hcd)
+{
+	struct platform_device *pdev;
+	struct dwc3 *dwc;
+
+	if (!usb_hcd_is_primary_hcd(hcd))
+		return;
+
+	pdev = to_platform_device(hcd->self.controller);
+	dwc = dev_get_drvdata(pdev->dev.parent);
+
+	dwc3_enable_susphy(dwc, true);
+}
+
+static const struct xhci_plat_priv dwc3_xhci_plat_quirk = {
+	.plat_start = dwc3_xhci_plat_start,
+};
+
 static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc,
 					int irq, char *name)
 {
@@ -167,6 +188,11 @@ int dwc3_host_init(struct dwc3 *dwc)
 		}
 	}
 
+	ret = platform_device_add_data(xhci, &dwc3_xhci_plat_quirk,
+				       sizeof(struct xhci_plat_priv));
+	if (ret)
+		goto err;
+
 	ret = platform_device_add(xhci);
 	if (ret) {
 		dev_err(dwc->dev, "failed to register xHCI device\n");
@@ -192,6 +218,7 @@ void dwc3_host_exit(struct dwc3 *dwc)
 	if (dwc->sys_wakeup)
 		device_init_wakeup(&dwc->xhci->dev, false);
 
+	dwc3_enable_susphy(dwc, false);
 	platform_device_unregister(dwc->xhci);
 	dwc->xhci = NULL;
 }

drivers/usb/gadget/composite.c

@@ -2112,7 +2112,7 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 			buf[5] = 0x01;
 			switch (ctrl->bRequestType & USB_RECIP_MASK) {
 			case USB_RECIP_DEVICE:
-				if (w_index != 0x4 || (w_value >> 8))
+				if (w_index != 0x4 || (w_value & 0xff))
 					break;
 				buf[6] = w_index;
 				/* Number of ext compat interfaces */
@@ -2128,9 +2128,9 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 				}
 				break;
 			case USB_RECIP_INTERFACE:
-				if (w_index != 0x5 || (w_value >> 8))
+				if (w_index != 0x5 || (w_value & 0xff))
 					break;
-				interface = w_value & 0xFF;
+				interface = w_value >> 8;
 				if (interface >= MAX_CONFIG_INTERFACES ||
 				    !os_desc_cfg->interface[interface])
 					break;

drivers/usb/gadget/function/f_fs.c

@@ -852,6 +852,7 @@ static void ffs_user_copy_worker(struct work_struct *work)
 						   work);
 	int ret = io_data->status;
 	bool kiocb_has_eventfd = io_data->kiocb->ki_flags & IOCB_EVENTFD;
+	unsigned long flags;
 
 	if (io_data->read && ret > 0) {
 		kthread_use_mm(io_data->mm);
@@ -864,6 +865,11 @@ static void ffs_user_copy_worker(struct work_struct *work)
 	if (io_data->ffs->ffs_eventfd && !kiocb_has_eventfd)
 		eventfd_signal(io_data->ffs->ffs_eventfd);
 
+	spin_lock_irqsave(&io_data->ffs->eps_lock, flags);
+	usb_ep_free_request(io_data->ep, io_data->req);
+	io_data->req = NULL;
+	spin_unlock_irqrestore(&io_data->ffs->eps_lock, flags);
+
 	if (io_data->read)
 		kfree(io_data->to_free);
 	ffs_free_buffer(io_data);
@@ -877,7 +883,6 @@ static void ffs_epfile_async_io_complete(struct usb_ep *_ep,
 	struct ffs_data *ffs = io_data->ffs;
 
 	io_data->status = req->status ? req->status : req->actual;
-	usb_ep_free_request(_ep, req);
 
 	INIT_WORK(&io_data->work, ffs_user_copy_worker);
 	queue_work(ffs->io_completion_wq, &io_data->work);
@@ -3806,7 +3811,7 @@ static int ffs_func_setup(struct usb_function *f,
 	__ffs_event_add(ffs, FUNCTIONFS_SETUP);
 	spin_unlock_irqrestore(&ffs->ev.waitq.lock, flags);
 
-	return creq->wLength == 0 ? USB_GADGET_DELAYED_STATUS : 0;
+	return ffs->ev.setup.wLength == 0 ? USB_GADGET_DELAYED_STATUS : 0;
 }
 
 static bool ffs_func_req_match(struct usb_function *f,

drivers/usb/gadget/function/uvc_configfs.c

@@ -92,10 +92,10 @@ static int __uvcg_iter_item_entries(const char *page, size_t len,
 
 	while (pg - page < len) {
 		i = 0;
-		while (i < sizeof(buf) && (pg - page < len) &&
+		while (i < bufsize && (pg - page < len) &&
 		       *pg != '\0' && *pg != '\n')
 			buf[i++] = *pg++;
-		if (i == sizeof(buf)) {
+		if (i == bufsize) {
 			ret = -EINVAL;
 			goto out_free_buf;
 		}

drivers/usb/host/ohci-hcd.c

@@ -888,6 +888,7 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 	/* Check for an all 1's result which is a typical consequence
 	 * of dead, unclocked, or unplugged (CardBus...) devices
 	 */
+again:
 	if (ints == ~(u32)0) {
 		ohci->rh_state = OHCI_RH_HALTED;
 		ohci_dbg (ohci, "device removed!\n");
@@ -982,6 +983,13 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 	}
 	spin_unlock(&ohci->lock);
 
+	/* repeat until all enabled interrupts are handled */
+	if (ohci->rh_state != OHCI_RH_HALTED) {
+		ints = ohci_readl(ohci, &regs->intrstatus);
+		if (ints && (ints & ohci_readl(ohci, &regs->intrenable)))
+			goto again;
+	}
+
 	return IRQ_HANDLED;
 }
 

drivers/usb/host/xhci-plat.h

@@ -8,7 +8,9 @@
 #ifndef _XHCI_PLAT_H
 #define _XHCI_PLAT_H
 
-#include "xhci.h"	/* for hcd_to_xhci() */
+struct device;
+struct platform_device;
+struct usb_hcd;
 
 struct xhci_plat_priv {
 	const char *firmware_name;

drivers/usb/host/xhci-rzv2m.c

@@ -6,6 +6,7 @@
  */
 
 #include <linux/usb/rzv2m_usb3drd.h>
+#include "xhci.h"
 #include "xhci-plat.h"
 #include "xhci-rzv2m.h"
 

drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c

@@ -104,14 +104,18 @@ static int qcom_pmic_typec_probe(struct platform_device *pdev)
 
 	ret = tcpm->port_start(tcpm, tcpm->tcpm_port);
 	if (ret)
-		goto fwnode_remove;
+		goto port_unregister;
 
 	ret = tcpm->pdphy_start(tcpm, tcpm->tcpm_port);
 	if (ret)
-		goto fwnode_remove;
+		goto port_stop;
 
 	return 0;
 
+port_stop:
+	tcpm->port_stop(tcpm);
+port_unregister:
+	tcpm_unregister_port(tcpm->tcpm_port);
 fwnode_remove:
 	fwnode_remove_software_node(tcpm->tcpc.fwnode);
 

drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c

@@ -475,10 +475,8 @@ static int qcom_pmic_typec_pdphy_enable(struct pmic_typec_pdphy *pmic_typec_pdph
 
 	qcom_pmic_typec_pdphy_reset_off(pmic_typec_pdphy);
 done:
-	if (ret) {
-		regulator_disable(pmic_typec_pdphy->vdd_pdphy);
+	if (ret)
 		dev_err(dev, "pdphy_enable fail %d\n", ret);
-	}
 
 	return ret;
 }
@@ -524,12 +522,17 @@ static int qcom_pmic_typec_pdphy_start(struct pmic_typec *tcpm,
 
 	ret = pmic_typec_pdphy_reset(pmic_typec_pdphy);
 	if (ret)
-		return ret;
+		goto err_disable_vdd_pdhy;
 
 	for (i = 0; i < pmic_typec_pdphy->nr_irqs; i++)
 		enable_irq(pmic_typec_pdphy->irq_data[i].irq);
 
 	return 0;
+
+err_disable_vdd_pdhy:
+	regulator_disable(pmic_typec_pdphy->vdd_pdphy);
+
+	return ret;
 }
 
 static void qcom_pmic_typec_pdphy_stop(struct pmic_typec *tcpm)

drivers/usb/typec/tcpm/tcpm.c

@@ -1564,8 +1564,12 @@ static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
 static void tcpm_queue_vdm_unlocked(struct tcpm_port *port, const u32 header,
 				    const u32 *data, int cnt, enum tcpm_transmit_type tx_sop_type)
 {
+	if (port->state != SRC_READY && port->state != SNK_READY &&
+	    port->state != SRC_VDM_IDENTITY_REQUEST)
+		return;
+
 	mutex_lock(&port->lock);
-	tcpm_queue_vdm(port, header, data, cnt, TCPC_TX_SOP);
+	tcpm_queue_vdm(port, header, data, cnt, tx_sop_type);
 	mutex_unlock(&port->lock);
 }
 
@@ -1580,7 +1584,8 @@ static void svdm_consume_identity(struct tcpm_port *port, const u32 *p, int cnt)
 	port->partner_ident.cert_stat = p[VDO_INDEX_CSTAT];
 	port->partner_ident.product = product;
 
-	typec_partner_set_identity(port->partner);
+	if (port->partner)
+		typec_partner_set_identity(port->partner);
 
 	tcpm_log(port, "Identity: %04x:%04x.%04x",
 		 PD_IDH_VID(vdo),
@@ -1742,6 +1747,9 @@ static void tcpm_register_partner_altmodes(struct tcpm_port *port)
 	struct typec_altmode *altmode;
 	int i;
 
+	if (!port->partner)
+		return;
+
 	for (i = 0; i < modep->altmodes; i++) {
 		altmode = typec_partner_register_altmode(port->partner,
 						&modep->altmode_desc[i]);
@@ -2996,7 +3004,7 @@ static int tcpm_register_source_caps(struct tcpm_port *port)
 {
 	struct usb_power_delivery_desc desc = { port->negotiated_rev };
 	struct usb_power_delivery_capabilities_desc caps = { };
-	struct usb_power_delivery_capabilities *cap;
+	struct usb_power_delivery_capabilities *cap = port->partner_source_caps;
 
 	if (!port->partner_pd)
 		port->partner_pd = usb_power_delivery_register(NULL, &desc);
@@ -3006,6 +3014,9 @@ static int tcpm_register_source_caps(struct tcpm_port *port)
 	memcpy(caps.pdo, port->source_caps, sizeof(u32) * port->nr_source_caps);
 	caps.role = TYPEC_SOURCE;
 
+	if (cap)
+		usb_power_delivery_unregister_capabilities(cap);
+
 	cap = usb_power_delivery_register_capabilities(port->partner_pd, &caps);
 	if (IS_ERR(cap))
 		return PTR_ERR(cap);
@@ -4231,7 +4242,10 @@ static int tcpm_init_vconn(struct tcpm_port *port)
 
 static void tcpm_typec_connect(struct tcpm_port *port)
 {
+	struct typec_partner *partner;
+
 	if (!port->connected) {
+		port->connected = true;
 		/* Make sure we don't report stale identity information */
 		memset(&port->partner_ident, 0, sizeof(port->partner_ident));
 		port->partner_desc.usb_pd = port->pd_capable;
@@ -4241,9 +4255,13 @@ static void tcpm_typec_connect(struct tcpm_port *port)
 			port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO;
 		else
 			port->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
-		port->partner = typec_register_partner(port->typec_port,
-						       &port->partner_desc);
-		port->connected = true;
+		partner = typec_register_partner(port->typec_port, &port->partner_desc);
+		if (IS_ERR(partner)) {
+			dev_err(port->dev, "Failed to register partner (%ld)\n", PTR_ERR(partner));
+			return;
+		}
+
+		port->partner = partner;
 		typec_partner_set_usb_power_delivery(port->partner, port->partner_pd);
 	}
 }
@@ -4323,9 +4341,11 @@ static void tcpm_typec_disconnect(struct tcpm_port *port)
 	port->plug_prime = NULL;
 	port->cable = NULL;
 	if (port->connected) {
-		typec_partner_set_usb_power_delivery(port->partner, NULL);
-		typec_unregister_partner(port->partner);
-		port->partner = NULL;
+		if (port->partner) {
+			typec_partner_set_usb_power_delivery(port->partner, NULL);
+			typec_unregister_partner(port->partner);
+			port->partner = NULL;
+		}
 		port->connected = false;
 	}
 }
@@ -4549,6 +4569,9 @@ static enum typec_cc_status tcpm_pwr_opmode_to_rp(enum typec_pwr_opmode opmode)
 
 static void tcpm_set_initial_svdm_version(struct tcpm_port *port)
 {
+	if (!port->partner)
+		return;
+
 	switch (port->negotiated_rev) {
 	case PD_REV30:
 		break;
@@ -5605,6 +5628,7 @@ static void run_state_machine(struct tcpm_port *port)
 		break;
 	case PORT_RESET:
 		tcpm_reset_port(port);
+		port->pd_events = 0;
 		if (port->self_powered)
 			tcpm_set_cc(port, TYPEC_CC_OPEN);
 		else