USB / Thunderbolt fixes for 6.10-rc4

Here are some small USB and Thunderbolt driver fixes for 6.10-rc4.
 Included in here are:
   - thunderbolt debugfs bugfix
   - USB typec bugfixes
   - kcov usb bugfix
   - xhci bugfixes
   - usb-storage bugfix
   - dt-bindings bugfix
   - cdc-wdm log message spam bugfix
 
 All of these, except for the last cdc-wdm log level change, have been in
 linux-next for a while with no reported problems.  The cdc-wdm bugfix
 has been tested by syzbot and proved to fix the reported cpu lockup
 issues when the log is constantly spammed by a broken device.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-6.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB / Thunderbolt fixes from Greg KH:
 "Here are some small USB and Thunderbolt driver fixes for 6.10-rc4.
  Included in here are:

   - thunderbolt debugfs bugfix

   - USB typec bugfixes

   - kcov usb bugfix

   - xhci bugfixes

   - usb-storage bugfix

   - dt-bindings bugfix

   - cdc-wdm log message spam bugfix

  All of these, except for the last cdc-wdm log level change, have been
  in linux-next for a while with no reported problems. The cdc-wdm
  bugfix has been tested by syzbot and proved to fix the reported cpu
  lockup issues when the log is constantly spammed by a broken device"

* tag 'usb-6.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages
  xhci: Handle TD clearing for multiple streams case
  xhci: Apply broken streams quirk to Etron EJ188 xHCI host
  xhci: Apply reset resume quirk to Etron EJ188 xHCI host
  xhci: Set correct transferred length for cancelled bulk transfers
  usb-storage: alauda: Check whether the media is initialized
  usb: typec: ucsi: Ack also failed Get Error commands
  kcov, usb: disable interrupts in kcov_remote_start_usb_softirq
  dt-bindings: usb: realtek,rts5411: Add missing "additionalProperties" on child nodes
  usb: typec: tcpm: Ignore received Hard Reset in TOGGLING state
  usb: typec: tcpm: fix use-after-free case in tcpm_register_source_caps
  USB: xen-hcd: Traverse host/ when CONFIG_USB_XEN_HCD is selected
  usb: typec: ucsi: glink: increase max ports for x1e80100
  Revert "usb: chipidea: move ci_ulpi_init after the phy initialization"
  thunderbolt: debugfs: Fix margin debugfs node creation condition

Documentation/devicetree/bindings/usb/realtek,rts5411.yaml

@@ -65,6 +65,7 @@ patternProperties:
     description: The hard wired USB devices
     type: object
     $ref: /schemas/usb/usb-device.yaml
+    additionalProperties: true
 
 required:
   - peer-hub

drivers/thunderbolt/debugfs.c

@@ -943,8 +943,9 @@ static void margining_port_init(struct tb_port *port)
 	debugfs_create_file("run", 0600, dir, port, &margining_run_fops);
 	debugfs_create_file("results", 0600, dir, port, &margining_results_fops);
 	debugfs_create_file("test", 0600, dir, port, &margining_test_fops);
-	if (independent_voltage_margins(usb4) ||
-	    (supports_time(usb4) && independent_time_margins(usb4)))
+	if (independent_voltage_margins(usb4) == USB4_MARGIN_CAP_0_VOLTAGE_HL ||
+	    (supports_time(usb4) &&
+	     independent_time_margins(usb4) == USB4_MARGIN_CAP_1_TIME_LR))
 		debugfs_create_file("margin", 0600, dir, port, &margining_margin_fops);
 }
 

drivers/usb/Makefile

@@ -35,6 +35,7 @@ obj-$(CONFIG_USB_R8A66597_HCD)	+= host/
 obj-$(CONFIG_USB_FSL_USB2)	+= host/
 obj-$(CONFIG_USB_FOTG210_HCD)	+= host/
 obj-$(CONFIG_USB_MAX3421_HCD)	+= host/
+obj-$(CONFIG_USB_XEN_HCD)	+= host/
 
 obj-$(CONFIG_USB_C67X00_HCD)	+= c67x00/
 

drivers/usb/chipidea/core.c

@@ -1084,6 +1084,10 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	ret = ci_ulpi_init(ci);
+	if (ret)
+		return ret;
+
 	if (ci->platdata->phy) {
 		ci->phy = ci->platdata->phy;
 	} else if (ci->platdata->usb_phy) {
@@ -1138,10 +1142,6 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 		goto ulpi_exit;
 	}
 
-	ret = ci_ulpi_init(ci);
-	if (ret)
-		return ret;
-
 	ci->hw_bank.phys = res->start;
 
 	ci->irq = platform_get_irq(pdev, 0);

drivers/usb/chipidea/ulpi.c

@@ -68,6 +68,11 @@ int ci_ulpi_init(struct ci_hdrc *ci)
 	if (ci->platdata->phy_mode != USBPHY_INTERFACE_MODE_ULPI)
 		return 0;
 
+	/*
+	 * Set PORTSC correctly so we can read/write ULPI registers for
+	 * identification purposes
+	 */
+	hw_phymode_configure(ci);
 
 	ci->ulpi_ops.read = ci_ulpi_read;
 	ci->ulpi_ops.write = ci_ulpi_write;

drivers/usb/class/cdc-wdm.c

@@ -266,14 +266,14 @@ static void wdm_int_callback(struct urb *urb)
 			dev_err(&desc->intf->dev, "Stall on int endpoint\n");
 			goto sw; /* halt is cleared in work */
 		default:
-			dev_err(&desc->intf->dev,
+			dev_err_ratelimited(&desc->intf->dev,
 				"nonzero urb status received: %d\n", status);
 			break;
 		}
 	}
 
 	if (urb->actual_length < sizeof(struct usb_cdc_notification)) {
-		dev_err(&desc->intf->dev, "wdm_int_callback - %d bytes\n",
+		dev_err_ratelimited(&desc->intf->dev, "wdm_int_callback - %d bytes\n",
 			urb->actual_length);
 		goto exit;
 	}

drivers/usb/core/hcd.c

@@ -1623,6 +1623,7 @@ static void __usb_hcd_giveback_urb(struct urb *urb)
 	struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus);
 	struct usb_anchor *anchor = urb->anchor;
 	int status = urb->unlinked;
+	unsigned long flags;
 
 	urb->hcpriv = NULL;
 	if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) &&
@@ -1640,13 +1641,14 @@ static void __usb_hcd_giveback_urb(struct urb *urb)
 	/* pass ownership to the completion handler */
 	urb->status = status;
 	/*
-	 * This function can be called in task context inside another remote
-	 * coverage collection section, but kcov doesn't support that kind of
-	 * recursion yet. Only collect coverage in softirq context for now.
+	 * Only collect coverage in the softirq context and disable interrupts
+	 * to avoid scenarios with nested remote coverage collection sections
+	 * that KCOV does not support.
+	 * See the comment next to kcov_remote_start_usb_softirq() for details.
 	 */
-	kcov_remote_start_usb_softirq((u64)urb->dev->bus->busnum);
+	flags = kcov_remote_start_usb_softirq((u64)urb->dev->bus->busnum);
 	urb->complete(urb);
-	kcov_remote_stop_softirq();
+	kcov_remote_stop_softirq(flags);
 
 	usb_anchor_resume_wakeups(anchor);
 	atomic_dec(&urb->use_count);

drivers/usb/host/xhci-pci.c

@@ -36,6 +36,7 @@
 
 #define PCI_VENDOR_ID_ETRON		0x1b6f
 #define PCI_DEVICE_ID_EJ168		0x7023
+#define PCI_DEVICE_ID_EJ188		0x7052
 
 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_XHCI	0x8c31
 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI	0x9c31
@@ -395,6 +396,12 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 		xhci->quirks |= XHCI_RESET_ON_RESUME;
 		xhci->quirks |= XHCI_BROKEN_STREAMS;
 	}
+	if (pdev->vendor == PCI_VENDOR_ID_ETRON &&
+			pdev->device == PCI_DEVICE_ID_EJ188) {
+		xhci->quirks |= XHCI_RESET_ON_RESUME;
+		xhci->quirks |= XHCI_BROKEN_STREAMS;
+	}
+
 	if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
 	    pdev->device == 0x0014) {
 		xhci->quirks |= XHCI_ZERO_64B_REGS;

drivers/usb/host/xhci-ring.c

@@ -1031,13 +1031,27 @@ static int xhci_invalidate_cancelled_tds(struct xhci_virt_ep *ep)
 				break;
 			case TD_DIRTY: /* TD is cached, clear it */
 			case TD_HALTED:
+			case TD_CLEARING_CACHE_DEFERRED:
+				if (cached_td) {
+					if (cached_td->urb->stream_id != td->urb->stream_id) {
+						/* Multiple streams case, defer move dq */
+						xhci_dbg(xhci,
+							 "Move dq deferred: stream %u URB %p\n",
+							 td->urb->stream_id, td->urb);
+						td->cancel_status = TD_CLEARING_CACHE_DEFERRED;
+						break;
+					}
+
+					/* Should never happen, but clear the TD if it does */
+					xhci_warn(xhci,
+						  "Found multiple active URBs %p and %p in stream %u?\n",
+						  td->urb, cached_td->urb,
+						  td->urb->stream_id);
+					td_to_noop(xhci, ring, cached_td, false);
+					cached_td->cancel_status = TD_CLEARED;
+				}
+
 				td->cancel_status = TD_CLEARING_CACHE;
-				if (cached_td)
-					/* FIXME  stream case, several stopped rings */
-					xhci_dbg(xhci,
-						 "Move dq past stream %u URB %p instead of stream %u URB %p\n",
-						 td->urb->stream_id, td->urb,
-						 cached_td->urb->stream_id, cached_td->urb);
 				cached_td = td;
 				break;
 			}
@@ -1057,10 +1071,16 @@ static int xhci_invalidate_cancelled_tds(struct xhci_virt_ep *ep)
 	if (err) {
 		/* Failed to move past cached td, just set cached TDs to no-op */
 		list_for_each_entry_safe(td, tmp_td, &ep->cancelled_td_list, cancelled_td_list) {
-			if (td->cancel_status != TD_CLEARING_CACHE)
+			/*
+			 * Deferred TDs need to have the deq pointer set after the above command
+			 * completes, so if that failed we just give up on all of them (and
+			 * complain loudly since this could cause issues due to caching).
+			 */
+			if (td->cancel_status != TD_CLEARING_CACHE &&
+			    td->cancel_status != TD_CLEARING_CACHE_DEFERRED)
 				continue;
-			xhci_dbg(xhci, "Failed to clear cancelled cached URB %p, mark clear anyway\n",
-				 td->urb);
+			xhci_warn(xhci, "Failed to clear cancelled cached URB %p, mark clear anyway\n",
+				  td->urb);
 			td_to_noop(xhci, ring, td, false);
 			td->cancel_status = TD_CLEARED;
 		}
@@ -1346,6 +1366,7 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
 	struct xhci_ep_ctx *ep_ctx;
 	struct xhci_slot_ctx *slot_ctx;
 	struct xhci_td *td, *tmp_td;
+	bool deferred = false;
 
 	ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3]));
 	stream_id = TRB_TO_STREAM_ID(le32_to_cpu(trb->generic.field[2]));
@@ -1432,6 +1453,8 @@ static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id,
 			xhci_dbg(ep->xhci, "%s: Giveback cancelled URB %p TD\n",
 				 __func__, td->urb);
 			xhci_td_cleanup(ep->xhci, td, ep_ring, td->status);
+		} else if (td->cancel_status == TD_CLEARING_CACHE_DEFERRED) {
+			deferred = true;
 		} else {
 			xhci_dbg(ep->xhci, "%s: Keep cancelled URB %p TD as cancel_status is %d\n",
 				 __func__, td->urb, td->cancel_status);
@@ -1441,8 +1464,17 @@ cleanup:
 	ep->ep_state &= ~SET_DEQ_PENDING;
 	ep->queued_deq_seg = NULL;
 	ep->queued_deq_ptr = NULL;
-	/* Restart any rings with pending URBs */
-	ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
+
+	if (deferred) {
+		/* We have more streams to clear */
+		xhci_dbg(ep->xhci, "%s: Pending TDs to clear, continuing with invalidation\n",
+			 __func__);
+		xhci_invalidate_cancelled_tds(ep);
+	} else {
+		/* Restart any rings with pending URBs */
+		xhci_dbg(ep->xhci, "%s: All TDs cleared, ring doorbell\n", __func__);
+		ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
+	}
 }
 
 static void xhci_handle_cmd_reset_ep(struct xhci_hcd *xhci, int slot_id,
@@ -2524,9 +2556,8 @@ static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep,
 		goto finish_td;
 	case COMP_STOPPED_LENGTH_INVALID:
 		/* stopped on ep trb with invalid length, exclude it */
-		ep_trb_len	= 0;
-		remaining	= 0;
-		break;
+		td->urb->actual_length = sum_trb_lengths(xhci, ep_ring, ep_trb);
+		goto finish_td;
 	case COMP_USB_TRANSACTION_ERROR:
 		if (xhci->quirks & XHCI_NO_SOFT_RETRY ||
 		    (ep->err_count++ > MAX_SOFT_RETRY) ||

drivers/usb/host/xhci.h

@@ -1276,6 +1276,7 @@ enum xhci_cancelled_td_status {
 	TD_DIRTY = 0,
 	TD_HALTED,
 	TD_CLEARING_CACHE,
+	TD_CLEARING_CACHE_DEFERRED,
 	TD_CLEARED,
 };
 

drivers/usb/storage/alauda.c

@@ -105,6 +105,8 @@ struct alauda_info {
 	unsigned char sense_key;
 	unsigned long sense_asc;	/* additional sense code */
 	unsigned long sense_ascq;	/* additional sense code qualifier */
+
+	bool media_initialized;
 };
 
 #define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) )
@@ -476,11 +478,12 @@ static int alauda_check_media(struct us_data *us)
 	}
 
 	/* Check for media change */
-	if (status[0] & 0x08) {
+	if (status[0] & 0x08 || !info->media_initialized) {
 		usb_stor_dbg(us, "Media change detected\n");
 		alauda_free_maps(&MEDIA_INFO(us));
-		alauda_init_media(us);
-
+		rc = alauda_init_media(us);
+		if (rc == USB_STOR_TRANSPORT_GOOD)
+			info->media_initialized = true;
 		info->sense_key = UNIT_ATTENTION;
 		info->sense_asc = 0x28;
 		info->sense_ascq = 0x00;

drivers/usb/typec/tcpm/tcpm.c

@@ -3014,8 +3014,10 @@ 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)
+	if (cap) {
 		usb_power_delivery_unregister_capabilities(cap);
+		port->partner_source_caps = NULL;
+	}
 
 	cap = usb_power_delivery_register_capabilities(port->partner_pd, &caps);
 	if (IS_ERR(cap))
@@ -6172,6 +6174,7 @@ static void _tcpm_pd_hard_reset(struct tcpm_port *port)
 		port->tcpc->set_bist_data(port->tcpc, false);
 
 	switch (port->state) {
+	case TOGGLING:
 	case ERROR_RECOVERY:
 	case PORT_RESET:
 	case PORT_RESET_WAIT_OFF:

drivers/usb/typec/ucsi/ucsi.c

@@ -153,8 +153,13 @@ static int ucsi_exec_command(struct ucsi *ucsi, u64 cmd)
 	}
 
 	if (cci & UCSI_CCI_ERROR) {
-		if (cmd == UCSI_GET_ERROR_STATUS)
+		if (cmd == UCSI_GET_ERROR_STATUS) {
+			ret = ucsi_acknowledge(ucsi, false);
+			if (ret)
+				return ret;
+
 			return -EIO;
+		}
 		return ucsi_read_error(ucsi);
 	}
 

drivers/usb/typec/ucsi/ucsi_glink.c

@@ -14,7 +14,7 @@
 #include <linux/soc/qcom/pmic_glink.h>
 #include "ucsi.h"
 
-#define PMIC_GLINK_MAX_PORTS	2
+#define PMIC_GLINK_MAX_PORTS		3
 
 #define UCSI_BUF_SIZE                   48
 

include/linux/kcov.h

@@ -55,21 +55,47 @@ static inline void kcov_remote_start_usb(u64 id)
 
 /*
  * The softirq flavor of kcov_remote_*() functions is introduced as a temporary
- * work around for kcov's lack of nested remote coverage sections support in
- * task context. Adding support for nested sections is tracked in:
- * https://bugzilla.kernel.org/show_bug.cgi?id=210337
+ * workaround for KCOV's lack of nested remote coverage sections support.
+ *
+ * Adding support is tracked in https://bugzilla.kernel.org/show_bug.cgi?id=210337.
+ *
+ * kcov_remote_start_usb_softirq():
+ *
+ * 1. Only collects coverage when called in the softirq context. This allows
+ *    avoiding nested remote coverage collection sections in the task context.
+ *    For example, USB/IP calls usb_hcd_giveback_urb() in the task context
+ *    within an existing remote coverage collection section. Thus, KCOV should
+ *    not attempt to start collecting coverage within the coverage collection
+ *    section in __usb_hcd_giveback_urb() in this case.
+ *
+ * 2. Disables interrupts for the duration of the coverage collection section.
+ *    This allows avoiding nested remote coverage collection sections in the
+ *    softirq context (a softirq might occur during the execution of a work in
+ *    the BH workqueue, which runs with in_serving_softirq() > 0).
+ *    For example, usb_giveback_urb_bh() runs in the BH workqueue with
+ *    interrupts enabled, so __usb_hcd_giveback_urb() might be interrupted in
+ *    the middle of its remote coverage collection section, and the interrupt
+ *    handler might invoke __usb_hcd_giveback_urb() again.
  */
 
-static inline void kcov_remote_start_usb_softirq(u64 id)
+static inline unsigned long kcov_remote_start_usb_softirq(u64 id)
 {
-	if (in_serving_softirq())
+	unsigned long flags = 0;
+
+	if (in_serving_softirq()) {
+		local_irq_save(flags);
 		kcov_remote_start_usb(id);
+	}
+
+	return flags;
 }
 
-static inline void kcov_remote_stop_softirq(void)
+static inline void kcov_remote_stop_softirq(unsigned long flags)
 {
-	if (in_serving_softirq())
+	if (in_serving_softirq()) {
 		kcov_remote_stop();
+		local_irq_restore(flags);
+	}
 }
 
 #ifdef CONFIG_64BIT
@@ -103,8 +129,11 @@ static inline u64 kcov_common_handle(void)
 }
 static inline void kcov_remote_start_common(u64 id) {}
 static inline void kcov_remote_start_usb(u64 id) {}
-static inline void kcov_remote_start_usb_softirq(u64 id) {}
-static inline void kcov_remote_stop_softirq(void) {}
+static inline unsigned long kcov_remote_start_usb_softirq(u64 id)
+{
+	return 0;
+}
+static inline void kcov_remote_stop_softirq(unsigned long flags) {}
 
 #endif /* CONFIG_KCOV */
 #endif /* _LINUX_KCOV_H */