forked from ~ljy/RK356X_SDK_RELEASE
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hc
2023-12-08 01573e231f18eb2d99162747186f59511f56b64d 
 kernel/drivers/usb/core/hub.c
....@@ -29,12 +29,13 @@
2929 #include <linux/mutex.h>
3030 #include <linux/random.h>
3131 #include <linux/pm_qos.h>
32
+#include <linux/kobject.h>
3233 
3334 #include <linux/uaccess.h>
3435 #include <asm/byteorder.h>
3536 
3637 #include "hub.h"
37
-#include "otg_whitelist.h"
38
+#include "otg_productlist.h"
3839 
3940 #define USB_VENDOR_GENESYS_LOGIC		0x05e3
4041 #define USB_VENDOR_SMSC				0x0424
....@@ -95,7 +96,7 @@
9596 MODULE_PARM_DESC(old_scheme_first,
9697 		 "start with the old device initialization scheme");
9798 
98
-static bool use_both_schemes = 1;
99
+static bool use_both_schemes = true;
99100 module_param(use_both_schemes, bool, S_IRUGO | S_IWUSR);
100101 MODULE_PARM_DESC(use_both_schemes,
101102 		"try the other device initialization scheme if the "
....@@ -618,6 +619,36 @@
618619 				   status, change, NULL);
619620 }
620621 
622
+static void hub_resubmit_irq_urb(struct usb_hub *hub)
623
+{
624
+	unsigned long flags;
625
+	int status;
626
+
627
+	spin_lock_irqsave(&hub->irq_urb_lock, flags);
628
+
629
+	if (hub->quiescing) {
630
+		spin_unlock_irqrestore(&hub->irq_urb_lock, flags);
631
+		return;
632
+	}
633
+
634
+	status = usb_submit_urb(hub->urb, GFP_ATOMIC);
635
+	if (status && status != -ENODEV && status != -EPERM &&
636
+	    status != -ESHUTDOWN) {
637
+		dev_err(hub->intfdev, "resubmit --> %d\n", status);
638
+		mod_timer(&hub->irq_urb_retry, jiffies + HZ);
639
+	}
640
+
641
+	spin_unlock_irqrestore(&hub->irq_urb_lock, flags);
642
+}
643
+
644
+static void hub_retry_irq_urb(struct timer_list *t)
645
+{
646
+	struct usb_hub *hub = from_timer(hub, t, irq_urb_retry);
647
+
648
+	hub_resubmit_irq_urb(hub);
649
+}
650
+
651
+
621652 static void kick_hub_wq(struct usb_hub *hub)
622653 {
623654 	struct usb_interface *intf;
....@@ -702,7 +733,7 @@
702733 		if ((++hub->nerrors < 10) || hub->error)
703734 			goto resubmit;
704735 		hub->error = status;
705
-		/* FALL THROUGH */
736
+		fallthrough;
706737 
707738 	/* let hub_wq handle things */
708739 	case 0:			/* we got data:  port status changed */
....@@ -720,12 +751,7 @@
720751 	kick_hub_wq(hub);
721752 
722753 resubmit:
723
-	if (hub->quiescing)
724
-		return;
725
-
726
-	status = usb_submit_urb(hub->urb, GFP_ATOMIC);
727
-	if (status != 0 && status != -ENODEV && status != -EPERM)
728
-		dev_err(hub->intfdev, "resubmit --> %d\n", status);
754
+	hub_resubmit_irq_urb(hub);
729755 }
730756 
731757 /* USB 2.0 spec Section 11.24.2.3 */
....@@ -857,7 +883,7 @@
857883 	/* info that CLEAR_TT_BUFFER needs */
858884 	clear->tt = tt->multi ? udev->ttport : 1;
859885 	clear->devinfo = usb_pipeendpoint (pipe);
860
-	clear->devinfo |= udev->devnum << 4;
886
+	clear->devinfo |= ((u16)udev->devaddr) << 4;
861887 	clear->devinfo |= usb_pipecontrol(pipe)
862888 			? (USB_ENDPOINT_XFER_CONTROL << 11)
863889 			: (USB_ENDPOINT_XFER_BULK << 11);
....@@ -1288,10 +1314,13 @@
12881314 static void hub_quiesce(struct usb_hub *hub, enum hub_quiescing_type type)
12891315 {
12901316 	struct usb_device *hdev = hub->hdev;
1317
+	unsigned long flags;
12911318 	int i;
12921319 
12931320 	/* hub_wq and related activity won't re-trigger */
1321
+	spin_lock_irqsave(&hub->irq_urb_lock, flags);
12941322 	hub->quiescing = 1;
1323
+	spin_unlock_irqrestore(&hub->irq_urb_lock, flags);
12951324 
12961325 	if (type != HUB_SUSPEND) {
12971326 		/* Disconnect all the children */
....@@ -1302,6 +1331,7 @@
13021331 	}
13031332 
13041333 	/* Stop hub_wq and related activity */
1334
+	del_timer_sync(&hub->irq_urb_retry);
13051335 	usb_kill_urb(hub->urb);
13061336 	if (hub->has_indicators)
13071337 		cancel_delayed_work_sync(&hub->leds);
....@@ -1814,7 +1844,7 @@
18141844 		return -E2BIG;
18151845 	}
18161846 
1817
-#ifdef	CONFIG_USB_OTG_BLACKLIST_HUB
1847
+#ifdef	CONFIG_USB_OTG_DISABLE_EXTERNAL_HUB
18181848 	if (hdev->parent) {
18191849 		dev_warn(&intf->dev, "ignoring external hub\n");
18201850 		return -ENODEV;
....@@ -1839,6 +1869,8 @@
18391869 	INIT_DELAYED_WORK(&hub->leds, led_work);
18401870 	INIT_DELAYED_WORK(&hub->init_work, NULL);
18411871 	INIT_WORK(&hub->events, hub_event);
1872
+	spin_lock_init(&hub->irq_urb_lock);
1873
+	timer_setup(&hub->irq_urb_retry, hub_retry_irq_urb, 0);
18421874 	usb_get_intf(intf);
18431875 	usb_get_dev(hdev);
18441876 
....@@ -2121,6 +2153,8 @@
21212153 	/* The address for a WUSB device is managed by wusbcore. */
21222154 	if (!udev->wusb)
21232155 		udev->devnum = devnum;
2156
+	if (!udev->devaddr)
2157
+		udev->devaddr = (u8)devnum;
21242158 }
21252159 
21262160 static void hub_free_dev(struct usb_device *udev)
....@@ -2379,7 +2413,7 @@
23792413 	if (err < 0)
23802414 		return err;
23812415 
2382
-	if (IS_ENABLED(CONFIG_USB_OTG_WHITELIST) && hcd->tpl_support &&
2416
+	if (IS_ENABLED(CONFIG_USB_OTG_PRODUCTLIST) && hcd->tpl_support &&
23832417 		!is_targeted(udev)) {
23842418 		/* Maybe it can talk to us, though we can't talk to it.
23852419 		 * (Includes HNP test device.)
....@@ -2681,11 +2715,20 @@
26812715 }
26822716 
26832717 
2718
+#ifdef CONFIG_USB_FEW_INIT_RETRIES
2719
+#define PORT_RESET_TRIES	2
2720
+#define SET_ADDRESS_TRIES	1
2721
+#define GET_DESCRIPTOR_TRIES	1
2722
+#define GET_MAXPACKET0_TRIES	1
2723
+#define PORT_INIT_TRIES		4
2724
+
2725
+#else
26842726 #define PORT_RESET_TRIES	5
26852727 #define SET_ADDRESS_TRIES	2
26862728 #define GET_DESCRIPTOR_TRIES	2
2687
-#define SET_CONFIG_TRIES	(2 * (use_both_schemes + 1))
2688
-#define USE_NEW_SCHEME(i, scheme)	((i) / 2 == (int)(scheme))
2729
+#define GET_MAXPACKET0_TRIES	3
2730
+#define PORT_INIT_TRIES		4
2731
+#endif	/* CONFIG_USB_FEW_INIT_RETRIES */
26892732 
26902733 #define HUB_ROOT_RESET_TIME	60	/* times are in msec */
26912734 #define HUB_SHORT_RESET_TIME	10
....@@ -2693,27 +2736,35 @@
26932736 #define HUB_LONG_RESET_TIME	200
26942737 #define HUB_RESET_TIMEOUT	800
26952738 
2696
-/*
2697
- * "New scheme" enumeration causes an extra state transition to be
2698
- * exposed to an xhci host and causes USB3 devices to receive control
2699
- * commands in the default state.  This has been seen to cause
2700
- * enumeration failures, so disable this enumeration scheme for USB3
2701
- * devices.
2702
- */
27032739 static bool use_new_scheme(struct usb_device *udev, int retry,
27042740 			   struct usb_port *port_dev)
27052741 {
27062742 	int old_scheme_first_port =
2707
-		port_dev->quirks & USB_PORT_QUIRK_OLD_SCHEME;
2743
+		(port_dev->quirks & USB_PORT_QUIRK_OLD_SCHEME) ||
2744
+		old_scheme_first;
27082745 
2746
+	/*
2747
+	 * "New scheme" enumeration causes an extra state transition to be
2748
+	 * exposed to an xhci host and causes USB3 devices to receive control
2749
+	 * commands in the default state.  This has been seen to cause
2750
+	 * enumeration failures, so disable this enumeration scheme for USB3
2751
+	 * devices.
2752
+	 */
27092753 	if (udev->speed >= USB_SPEED_SUPER)
27102754 		return false;
27112755 
2712
-	return USE_NEW_SCHEME(retry, old_scheme_first_port || old_scheme_first);
2756
+	/*
2757
+	 * If use_both_schemes is set, use the first scheme (whichever
2758
+	 * it is) for the larger half of the retries, then use the other
2759
+	 * scheme.  Otherwise, use the first scheme for all the retries.
2760
+	 */
2761
+	if (use_both_schemes && retry >= (PORT_INIT_TRIES + 1) / 2)
2762
+		return old_scheme_first_port;	/* Second half */
2763
+	return !old_scheme_first_port;		/* First half or all */
27132764 }
27142765 
27152766 /* Is a USB 3.0 port in the Inactive or Compliance Mode state?
2716
- * Port worm reset is required to recover
2767
+ * Port warm reset is required to recover
27172768  */
27182769 static bool hub_port_warm_reset_required(struct usb_hub *hub, int port1,
27192770 		u16 portstatus)
....@@ -3177,13 +3228,14 @@
31773228 }
31783229 
31793230 /* Count of wakeup-enabled devices at or below udev */
3180
-static unsigned wakeup_enabled_descendants(struct usb_device *udev)
3231
+unsigned usb_wakeup_enabled_descendants(struct usb_device *udev)
31813232 {
31823233 	struct usb_hub *hub = usb_hub_to_struct_hub(udev);
31833234 
31843235 	return udev->do_remote_wakeup +
31853236 			(hub ? hub->wakeup_enabled_descendants : 0);
31863237 }
3238
+EXPORT_SYMBOL_GPL(usb_wakeup_enabled_descendants);
31873239 
31883240 /*
31893241  * usb_port_suspend - suspend a usb device's upstream port
....@@ -3285,7 +3337,7 @@
32853337 	 * Therefore we will turn on the suspend feature if udev or any of its
32863338 	 * descendants is enabled for remote wakeup.
32873339 	 */
3288
-	else if (PMSG_IS_AUTO(msg) || wakeup_enabled_descendants(udev) > 0)
3340
+	else if (PMSG_IS_AUTO(msg) || usb_wakeup_enabled_descendants(udev) > 0)
32893341 		status = set_port_feature(hub->hdev, port1,
32903342 				USB_PORT_FEAT_SUSPEND);
32913343 	else {
....@@ -3513,7 +3565,7 @@
35133565 	u16		portchange, portstatus;
35143566 
35153567 	if (!test_and_set_bit(port1, hub->child_usage_bits)) {
3516
-		status = pm_runtime_get_sync(&port_dev->dev);
3568
+		status = pm_runtime_resume_and_get(&port_dev->dev);
35173569 		if (status < 0) {
35183570 			dev_dbg(&udev->dev, "can't resume usb port, status %d\n",
35193571 					status);
....@@ -3674,7 +3726,6 @@
36743726 	struct usb_hub		*hub = usb_get_intfdata(intf);
36753727 	struct usb_device	*hdev = hub->hdev;
36763728 	unsigned		port1;
3677
-	int			status;
36783729 
36793730 	/*
36803731 	 * Warn if children aren't already suspended.
....@@ -3693,7 +3744,7 @@
36933744 		}
36943745 		if (udev)
36953746 			hub->wakeup_enabled_descendants +=
3696
-					wakeup_enabled_descendants(udev);
3747
+					usb_wakeup_enabled_descendants(udev);
36973748 	}
36983749 
36993750 	if (hdev->do_remote_wakeup && hub->quirk_check_port_auto_suspend) {
....@@ -3708,12 +3759,12 @@
37083759 	if (hub_is_superspeed(hdev) && hdev->do_remote_wakeup) {
37093760 		/* Enable hub to send remote wakeup for all ports. */
37103761 		for (port1 = 1; port1 <= hdev->maxchild; port1++) {
3711
-			status = set_port_feature(hdev,
3712
-					port1 |
3713
-					USB_PORT_FEAT_REMOTE_WAKE_CONNECT |
3714
-					USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT |
3715
-					USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT,
3716
-					USB_PORT_FEAT_REMOTE_WAKE_MASK);
3762
+			set_port_feature(hdev,
3763
+					 port1 |
3764
+					 USB_PORT_FEAT_REMOTE_WAKE_CONNECT |
3765
+					 USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT |
3766
+					 USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT,
3767
+					 USB_PORT_FEAT_REMOTE_WAKE_MASK);
37173768 		}
37183769 	}
37193770 
....@@ -4193,7 +4244,7 @@
41934244 	if (!udev || !udev->parent ||
41944245 			udev->speed < USB_SPEED_SUPER ||
41954246 			!udev->lpm_capable ||
4196
-			udev->state < USB_STATE_DEFAULT)
4247
+			udev->state < USB_STATE_CONFIGURED)
41974248 		return 0;
41984249 
41994250 	hcd = bus_to_hcd(udev->bus);
....@@ -4252,7 +4303,7 @@
42524303 	if (!udev || !udev->parent ||
42534304 			udev->speed < USB_SPEED_SUPER ||
42544305 			!udev->lpm_capable ||
4255
-			udev->state < USB_STATE_DEFAULT)
4306
+			udev->state < USB_STATE_CONFIGURED)
42564307 		return;
42574308 
42584309 	udev->lpm_disable_count--;
....@@ -4565,6 +4616,7 @@
45654616 	const char		*speed;
45664617 	int			devnum = udev->devnum;
45674618 	const char		*driver_name;
4619
+	bool			do_new_scheme;
45684620 
45694621 	/* root hub ports have a slightly longer reset period
45704622 	 * (from USB 2.0 spec, section 7.1.7.5)
....@@ -4675,14 +4727,13 @@
46754727 	 * first 8 bytes of the device descriptor to get the ep0 maxpacket
46764728 	 * value.
46774729 	 */
4678
-	for (retries = 0; retries < GET_DESCRIPTOR_TRIES; (++retries, msleep(100))) {
4679
-		bool did_new_scheme = false;
4730
+	do_new_scheme = use_new_scheme(udev, retry_counter, port_dev);
46804731 
4681
-		if (use_new_scheme(udev, retry_counter, port_dev)) {
4732
+	for (retries = 0; retries < GET_DESCRIPTOR_TRIES; (++retries, msleep(100))) {
4733
+		if (do_new_scheme) {
46824734 			struct usb_device_descriptor *buf;
46834735 			int r = 0;
46844736 
4685
-			did_new_scheme = true;
46864737 			retval = hub_enable_device(udev);
46874738 			if (retval < 0) {
46884739 				dev_err(&udev->dev,
....@@ -4702,7 +4753,8 @@
47024753 			 * 255 is for WUSB devices, we actually need to use
47034754 			 * 512 (WUSB1.0[4.8.1]).
47044755 			 */
4705
-			for (operations = 0; operations < 3; ++operations) {
4756
+			for (operations = 0; operations < GET_MAXPACKET0_TRIES;
4757
+					++operations) {
47064758 				buf->bMaxPacketSize0 = 0;
47074759 				r = usb_control_msg(udev, usb_rcvaddr0pipe(),
47084760 					USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
....@@ -4716,7 +4768,7 @@
47164768 						r = 0;
47174769 						break;
47184770 					}
4719
-					/* FALL THROUGH */
4771
+					fallthrough;
47204772 				default:
47214773 					if (r == 0)
47224774 						r = -EPROTO;
....@@ -4791,11 +4843,7 @@
47914843 			 *  - read ep0 maxpacket even for high and low speed,
47924844 			 */
47934845 			msleep(10);
4794
-			/* use_new_scheme() checks the speed which may have
4795
-			 * changed since the initial look so we cache the result
4796
-			 * in did_new_scheme
4797
-			 */
4798
-			if (did_new_scheme)
4846
+			if (do_new_scheme)
47994847 				break;
48004848 		}
48014849 
....@@ -4972,6 +5020,91 @@
49725020 	return remaining;
49735021 }
49745022 
5023
+
5024
+static int descriptors_changed(struct usb_device *udev,
5025
+		struct usb_device_descriptor *old_device_descriptor,
5026
+		struct usb_host_bos *old_bos)
5027
+{
5028
+	int		changed = 0;
5029
+	unsigned	index;
5030
+	unsigned	serial_len = 0;
5031
+	unsigned	len;
5032
+	unsigned	old_length;
5033
+	int		length;
5034
+	char		*buf;
5035
+
5036
+	if (memcmp(&udev->descriptor, old_device_descriptor,
5037
+			sizeof(*old_device_descriptor)) != 0)
5038
+		return 1;
5039
+
5040
+	if ((old_bos && !udev->bos) || (!old_bos && udev->bos))
5041
+		return 1;
5042
+	if (udev->bos) {
5043
+		len = le16_to_cpu(udev->bos->desc->wTotalLength);
5044
+		if (len != le16_to_cpu(old_bos->desc->wTotalLength))
5045
+			return 1;
5046
+		if (memcmp(udev->bos->desc, old_bos->desc, len))
5047
+			return 1;
5048
+	}
5049
+
5050
+	/* Since the idVendor, idProduct, and bcdDevice values in the
5051
+	 * device descriptor haven't changed, we will assume the
5052
+	 * Manufacturer and Product strings haven't changed either.
5053
+	 * But the SerialNumber string could be different (e.g., a
5054
+	 * different flash card of the same brand).
5055
+	 */
5056
+	if (udev->serial)
5057
+		serial_len = strlen(udev->serial) + 1;
5058
+
5059
+	len = serial_len;
5060
+	for (index = 0; index < udev->descriptor.bNumConfigurations; index++) {
5061
+		old_length = le16_to_cpu(udev->config[index].desc.wTotalLength);
5062
+		len = max(len, old_length);
5063
+	}
5064
+
5065
+	buf = kmalloc(len, GFP_NOIO);
5066
+	if (!buf)
5067
+		/* assume the worst */
5068
+		return 1;
5069
+
5070
+	for (index = 0; index < udev->descriptor.bNumConfigurations; index++) {
5071
+		old_length = le16_to_cpu(udev->config[index].desc.wTotalLength);
5072
+		length = usb_get_descriptor(udev, USB_DT_CONFIG, index, buf,
5073
+				old_length);
5074
+		if (length != old_length) {
5075
+			dev_dbg(&udev->dev, "config index %d, error %d\n",
5076
+					index, length);
5077
+			changed = 1;
5078
+			break;
5079
+		}
5080
+		if (memcmp(buf, udev->rawdescriptors[index], old_length)
5081
+				!= 0) {
5082
+			dev_dbg(&udev->dev, "config index %d changed (#%d)\n",
5083
+				index,
5084
+				((struct usb_config_descriptor *) buf)->
5085
+					bConfigurationValue);
5086
+			changed = 1;
5087
+			break;
5088
+		}
5089
+	}
5090
+
5091
+	if (!changed && serial_len) {
5092
+		length = usb_string(udev, udev->descriptor.iSerialNumber,
5093
+				buf, serial_len);
5094
+		if (length + 1 != serial_len) {
5095
+			dev_dbg(&udev->dev, "serial string error %d\n",
5096
+					length);
5097
+			changed = 1;
5098
+		} else if (memcmp(buf, udev->serial, length) != 0) {
5099
+			dev_dbg(&udev->dev, "serial string changed\n");
5100
+			changed = 1;
5101
+		}
5102
+	}
5103
+
5104
+	kfree(buf);
5105
+	return changed;
5106
+}
5107
+
49755108 static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus,
49765109 		u16 portchange)
49775110 {
....@@ -5040,11 +5173,10 @@
50405173 
50415174 	status = 0;
50425175 
5043
-	for (i = 0; i < SET_CONFIG_TRIES; i++) {
5176
+	for (i = 0; i < PORT_INIT_TRIES; i++) {
50445177 		usb_lock_port(port_dev);
50455178 		mutex_lock(hcd->address0_mutex);
50465179 		retry_locked = true;
5047
-
50485180 		/* reallocate for each attempt, since references
50495181 		 * to the previous one can escape in various ways
50505182 		 */
....@@ -5184,7 +5316,7 @@
51845316 			break;
51855317 
51865318 		/* When halfway through our retry count, power-cycle the port */
5187
-		if (i == (SET_CONFIG_TRIES / 2) - 1) {
5319
+		if (i == (PORT_INIT_TRIES - 1) / 2) {
51885320 			dev_info(&port_dev->dev, "attempt power cycle\n");
51895321 			usb_hub_set_port_power(hdev, hub, port1, false);
51905322 			msleep(2 * hub_power_on_good_delay(hub));
....@@ -5204,7 +5336,7 @@
52045336 	hub_port_disable(hub, port1, 1);
52055337 	if (hcd->driver->relinquish_port && !hub->hdev->parent) {
52065338 		if ((status != -ENOTCONN && status != -ENODEV) ||
5207
-		    (status == -ENOTCONN && hcd->rk3288_relinquish_port_quirk))
5339
+		    (status == -ENOTCONN && of_machine_is_compatible("rockchip,rk3288")))
52085340 			hcd->driver->relinquish_port(hcd, port1);
52095341 	}
52105342 }
....@@ -5223,7 +5355,9 @@
52235355 {
52245356 	struct usb_port *port_dev = hub->ports[port1 - 1];
52255357 	struct usb_device *udev = port_dev->child;
5358
+	struct usb_device_descriptor descriptor;
52265359 	int status = -ENODEV;
5360
+	int retval;
52275361 
52285362 	dev_dbg(&port_dev->dev, "status %04x, change %04x, %s\n", portstatus,
52295363 			portchange, portspeed(hub, portstatus));
....@@ -5244,7 +5378,30 @@
52445378 	if ((portstatus & USB_PORT_STAT_CONNECTION) && udev &&
52455379 			udev->state != USB_STATE_NOTATTACHED) {
52465380 		if (portstatus & USB_PORT_STAT_ENABLE) {
5247
-			status = 0;		/* Nothing to do */
5381
+			/*
5382
+			 * USB-3 connections are initialized automatically by
5383
+			 * the hostcontroller hardware. Therefore check for
5384
+			 * changed device descriptors before resuscitating the
5385
+			 * device.
5386
+			 */
5387
+			descriptor = udev->descriptor;
5388
+			retval = usb_get_device_descriptor(udev,
5389
+					sizeof(udev->descriptor));
5390
+			if (retval < 0) {
5391
+				dev_dbg(&udev->dev,
5392
+						"can't read device descriptor %d\n",
5393
+						retval);
5394
+			} else {
5395
+				if (descriptors_changed(udev, &descriptor,
5396
+						udev->bos)) {
5397
+					dev_dbg(&udev->dev,
5398
+							"device descriptor has changed\n");
5399
+					/* for disconnect() calls */
5400
+					udev->descriptor = descriptor;
5401
+				} else {
5402
+					status = 0; /* Nothing to do */
5403
+				}
5404
+			}
52485405 #ifdef CONFIG_PM
52495406 		} else if (udev->state == USB_STATE_SUSPENDED &&
52505407 				udev->persist_enabled) {
....@@ -5268,6 +5425,43 @@
52685425 	usb_unlock_port(port_dev);
52695426 	hub_port_connect(hub, port1, portstatus, portchange);
52705427 	usb_lock_port(port_dev);
5428
+}
5429
+
5430
+/* Handle notifying userspace about hub over-current events */
5431
+static void port_over_current_notify(struct usb_port *port_dev)
5432
+{
5433
+	char *envp[3];
5434
+	struct device *hub_dev;
5435
+	char *port_dev_path;
5436
+
5437
+	sysfs_notify(&port_dev->dev.kobj, NULL, "over_current_count");
5438
+
5439
+	hub_dev = port_dev->dev.parent;
5440
+
5441
+	if (!hub_dev)
5442
+		return;
5443
+
5444
+	port_dev_path = kobject_get_path(&port_dev->dev.kobj, GFP_KERNEL);
5445
+	if (!port_dev_path)
5446
+		return;
5447
+
5448
+	envp[0] = kasprintf(GFP_KERNEL, "OVER_CURRENT_PORT=%s", port_dev_path);
5449
+	if (!envp[0])
5450
+		goto exit_path;
5451
+
5452
+	envp[1] = kasprintf(GFP_KERNEL, "OVER_CURRENT_COUNT=%u",
5453
+			port_dev->over_current_count);
5454
+	if (!envp[1])
5455
+		goto exit;
5456
+
5457
+	envp[2] = NULL;
5458
+	kobject_uevent_env(&hub_dev->kobj, KOBJ_CHANGE, envp);
5459
+
5460
+	kfree(envp[1]);
5461
+exit:
5462
+	kfree(envp[0]);
5463
+exit_path:
5464
+	kfree(port_dev_path);
52715465 }
52725466 
52735467 static void port_event(struct usb_hub *hub, int port1)
....@@ -5312,6 +5506,7 @@
53125506 	if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
53135507 		u16 status = 0, unused;
53145508 		port_dev->over_current_count++;
5509
+		port_over_current_notify(port_dev);
53155510 
53165511 		dev_dbg(&port_dev->dev, "over-current change #%u\n",
53175512 			port_dev->over_current_count);
....@@ -5366,24 +5561,7 @@
53665561 		} else {
53675562 			usb_unlock_port(port_dev);
53685563 			usb_lock_device(udev);
5369
-
5370
-			/**
5371
-			 * Some special SoCs (e.g. rk322xh) USB3 PHY lose the
5372
-			 * ability to detect a disconnection when USB3 device
5373
-			 * plug out, fortunately, it can detect port link state
5374
-			 * change here, so we can do soft disconnect according
5375
-			 * to the PLC here.
5376
-			 *
5377
-			 * And we only need to do the soft disconnect for root
5378
-			 * hub. In addition, we just reuse the autosuspend quirk
5379
-			 * but not add a new quirk for this issue. Because this
5380
-			 * issue always occurs with autosuspend problem.
5381
-			 */
5382
-			if (!hub->hdev->parent && (hdev->quirks &
5383
-			    USB_QUIRK_AUTO_SUSPEND))
5384
-				usb_remove_device(udev);
5385
-			else
5386
-				usb_reset_device(udev);
5564
+			usb_reset_device(udev);
53875565 			usb_unlock_device(udev);
53885566 			usb_lock_port(port_dev);
53895567 			connect_change = 0;
....@@ -5601,90 +5779,6 @@
56015779 	usb_deregister(&hub_driver);
56025780 } /* usb_hub_cleanup() */
56035781 
5604
-static int descriptors_changed(struct usb_device *udev,
5605
-		struct usb_device_descriptor *old_device_descriptor,
5606
-		struct usb_host_bos *old_bos)
5607
-{
5608
-	int		changed = 0;
5609
-	unsigned	index;
5610
-	unsigned	serial_len = 0;
5611
-	unsigned	len;
5612
-	unsigned	old_length;
5613
-	int		length;
5614
-	char		*buf;
5615
-
5616
-	if (memcmp(&udev->descriptor, old_device_descriptor,
5617
-			sizeof(*old_device_descriptor)) != 0)
5618
-		return 1;
5619
-
5620
-	if ((old_bos && !udev->bos) || (!old_bos && udev->bos))
5621
-		return 1;
5622
-	if (udev->bos) {
5623
-		len = le16_to_cpu(udev->bos->desc->wTotalLength);
5624
-		if (len != le16_to_cpu(old_bos->desc->wTotalLength))
5625
-			return 1;
5626
-		if (memcmp(udev->bos->desc, old_bos->desc, len))
5627
-			return 1;
5628
-	}
5629
-
5630
-	/* Since the idVendor, idProduct, and bcdDevice values in the
5631
-	 * device descriptor haven't changed, we will assume the
5632
-	 * Manufacturer and Product strings haven't changed either.
5633
-	 * But the SerialNumber string could be different (e.g., a
5634
-	 * different flash card of the same brand).
5635
-	 */
5636
-	if (udev->serial)
5637
-		serial_len = strlen(udev->serial) + 1;
5638
-
5639
-	len = serial_len;
5640
-	for (index = 0; index < udev->descriptor.bNumConfigurations; index++) {
5641
-		old_length = le16_to_cpu(udev->config[index].desc.wTotalLength);
5642
-		len = max(len, old_length);
5643
-	}
5644
-
5645
-	buf = kmalloc(len, GFP_NOIO);
5646
-	if (!buf)
5647
-		/* assume the worst */
5648
-		return 1;
5649
-
5650
-	for (index = 0; index < udev->descriptor.bNumConfigurations; index++) {
5651
-		old_length = le16_to_cpu(udev->config[index].desc.wTotalLength);
5652
-		length = usb_get_descriptor(udev, USB_DT_CONFIG, index, buf,
5653
-				old_length);
5654
-		if (length != old_length) {
5655
-			dev_dbg(&udev->dev, "config index %d, error %d\n",
5656
-					index, length);
5657
-			changed = 1;
5658
-			break;
5659
-		}
5660
-		if (memcmp(buf, udev->rawdescriptors[index], old_length)
5661
-				!= 0) {
5662
-			dev_dbg(&udev->dev, "config index %d changed (#%d)\n",
5663
-				index,
5664
-				((struct usb_config_descriptor *) buf)->
5665
-					bConfigurationValue);
5666
-			changed = 1;
5667
-			break;
5668
-		}
5669
-	}
5670
-
5671
-	if (!changed && serial_len) {
5672
-		length = usb_string(udev, udev->descriptor.iSerialNumber,
5673
-				buf, serial_len);
5674
-		if (length + 1 != serial_len) {
5675
-			dev_dbg(&udev->dev, "serial string error %d\n",
5676
-					length);
5677
-			changed = 1;
5678
-		} else if (memcmp(buf, udev->serial, length) != 0) {
5679
-			dev_dbg(&udev->dev, "serial string changed\n");
5680
-			changed = 1;
5681
-		}
5682
-	}
5683
-
5684
-	kfree(buf);
5685
-	return changed;
5686
-}
5687
-
56885782 /**
56895783  * usb_reset_and_verify_device - perform a USB port reset to reinitialize a device
56905784  * @udev: device to reset (not in SUSPENDED or NOTATTACHED state)
....@@ -5761,7 +5855,7 @@
57615855 
57625856 	mutex_lock(hcd->address0_mutex);
57635857 
5764
-	for (i = 0; i < SET_CONFIG_TRIES; ++i) {
5858
+	for (i = 0; i < PORT_INIT_TRIES; ++i) {
57655859 
57665860 		/* ep0 maxpacket size may change; let the HCD know about it.
57675861 		 * Other endpoints will be handled by re-enumeration. */