debug lk

hc

2024-02-20 e636c8d336489bf3eed5878299e6cc045bbad077

 kernel/drivers/usb/core/port.c
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@@ -16,6 +16,15 @@
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 static const struct attribute_group *port_dev_group[];
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+static ssize_t location_show(struct device *dev,
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+			     struct device_attribute *attr, char *buf)
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+{
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+	struct usb_port *port_dev = to_usb_port(dev);
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+
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+	return sprintf(buf, "0x%08x\n", port_dev->location);
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+}
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+static DEVICE_ATTR_RO(location);
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+
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 static ssize_t connect_type_show(struct device *dev,
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 				 struct device_attribute *attr, char *buf)
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 {
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@@ -140,6 +149,7 @@
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 static struct attribute *port_dev_attrs[] = {
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 	&dev_attr_connect_type.attr,
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+	&dev_attr_location.attr,
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 	&dev_attr_quirks.attr,
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 	&dev_attr_over_current_count.attr,
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 	NULL,
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@@ -281,6 +291,14 @@
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 }
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 #endif
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+static void usb_port_shutdown(struct device *dev)
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+{
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+	struct usb_port *port_dev = to_usb_port(dev);
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+
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+	if (port_dev->child)
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+		usb_disable_usb2_hardware_lpm(port_dev->child);
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+}
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+
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 static const struct dev_pm_ops usb_port_pm_ops = {
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 #ifdef CONFIG_PM
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 	.runtime_suspend =	usb_port_runtime_suspend,
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@@ -297,6 +315,7 @@
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 static struct device_driver usb_port_driver = {
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 	.name = "usb",
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 	.owner = THIS_MODULE,
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+	.shutdown = usb_port_shutdown,
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 };
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 static int link_peers(struct usb_port *left, struct usb_port *right)