Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2015 Karol Kosik <karo9@interia.eu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (C) 2015-2016 Samsung Electronics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *               Igor Kotrasinski <i.kotrasinsk@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *               Krzysztof Opasiak <k.opasiak@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/usb/gadget.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/usb/ch9.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/kthread.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/byteorder/generic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "usbip_common.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "vudc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) /* called with udc->lock held */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) int get_gadget_descs(struct vudc *udc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	struct vrequest *usb_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	struct vep *ep0 = to_vep(udc->gadget.ep0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	struct usb_device_descriptor *ddesc = &udc->dev_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	struct usb_ctrlrequest req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	if (!udc->driver || !udc->pullup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	req.bRequestType = USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	req.bRequest = USB_REQ_GET_DESCRIPTOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	req.wValue = cpu_to_le16(USB_DT_DEVICE << 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	req.wIndex = cpu_to_le16(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	req.wLength = cpu_to_le16(sizeof(*ddesc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	spin_unlock(&udc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	ret = udc->driver->setup(&(udc->gadget), &req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	spin_lock(&udc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	/* assuming request queue is empty; request is now on top */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	usb_req = list_last_entry(&ep0->req_queue, struct vrequest, req_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	list_del(&usb_req->req_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	if (usb_req->req.length > sizeof(*ddesc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		ret = -EOVERFLOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		goto giveback_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	memcpy(ddesc, usb_req->req.buf, sizeof(*ddesc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	udc->desc_cached = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) giveback_req:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	usb_req->req.status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	usb_req->req.actual = usb_req->req.length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	usb_gadget_giveback_request(&(ep0->ep), &(usb_req->req));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67)  * Exposes device descriptor from the gadget driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) static ssize_t dev_desc_read(struct file *file, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 			     struct bin_attribute *attr, char *out,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 			     loff_t off, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	struct device *dev = kobj_to_dev(kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	struct vudc *udc = (struct vudc *)dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	char *desc_ptr = (char *) &udc->dev_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	spin_lock_irqsave(&udc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	if (!udc->desc_cached) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	memcpy(out, desc_ptr + off, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	ret = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	spin_unlock_irqrestore(&udc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) static BIN_ATTR_RO(dev_desc, sizeof(struct usb_device_descriptor));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) static ssize_t usbip_sockfd_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 				  struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 				  const char *in, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	struct vudc *udc = (struct vudc *) dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	int sockfd = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	struct socket *socket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	struct task_struct *tcp_rx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	struct task_struct *tcp_tx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	rv = kstrtoint(in, 0, &sockfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	if (rv != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	if (!udc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		dev_err(dev, "no device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	mutex_lock(&udc->ud.sysfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	spin_lock_irqsave(&udc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	/* Don't export what we don't have */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (!udc->driver || !udc->pullup) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		dev_err(dev, "gadget not bound");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	if (sockfd != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		if (udc->connected) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			dev_err(dev, "Device already connected");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			ret = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		spin_lock_irq(&udc->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		if (udc->ud.status != SDEV_ST_AVAILABLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			goto unlock_ud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		socket = sockfd_lookup(sockfd, &err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		if (!socket) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 			dev_err(dev, "failed to lookup sock");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			goto unlock_ud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		if (socket->type != SOCK_STREAM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			dev_err(dev, "Expecting SOCK_STREAM - found %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 				socket->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 			goto sock_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		/* unlock and create threads and get tasks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		spin_unlock_irq(&udc->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		spin_unlock_irqrestore(&udc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		tcp_rx = kthread_create(&v_rx_loop, &udc->ud, "vudc_rx");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		if (IS_ERR(tcp_rx)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			sockfd_put(socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 			mutex_unlock(&udc->ud.sysfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		tcp_tx = kthread_create(&v_tx_loop, &udc->ud, "vudc_tx");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		if (IS_ERR(tcp_tx)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 			kthread_stop(tcp_rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			sockfd_put(socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 			mutex_unlock(&udc->ud.sysfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		/* get task structs now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		get_task_struct(tcp_rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		get_task_struct(tcp_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		/* lock and update udc->ud state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		spin_lock_irqsave(&udc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		spin_lock_irq(&udc->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		udc->ud.tcp_socket = socket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		udc->ud.tcp_rx = tcp_rx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		udc->ud.tcp_tx = tcp_tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		udc->ud.status = SDEV_ST_USED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		spin_unlock_irq(&udc->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		ktime_get_ts64(&udc->start_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		v_start_timer(udc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		udc->connected = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		spin_unlock_irqrestore(&udc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		wake_up_process(udc->ud.tcp_rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		wake_up_process(udc->ud.tcp_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		mutex_unlock(&udc->ud.sysfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		if (!udc->connected) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 			dev_err(dev, "Device not connected");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 			goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		spin_lock_irq(&udc->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		if (udc->ud.status != SDEV_ST_USED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 			goto unlock_ud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		spin_unlock_irq(&udc->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		usbip_event_add(&udc->ud, VUDC_EVENT_DOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	spin_unlock_irqrestore(&udc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	mutex_unlock(&udc->ud.sysfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) sock_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	sockfd_put(socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) unlock_ud:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	spin_unlock_irq(&udc->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	spin_unlock_irqrestore(&udc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	mutex_unlock(&udc->ud.sysfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) static DEVICE_ATTR_WO(usbip_sockfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static ssize_t usbip_status_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			       struct device_attribute *attr, char *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	struct vudc *udc = (struct vudc *) dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	if (!udc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		dev_err(dev, "no device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	spin_lock_irq(&udc->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	status = udc->ud.status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	spin_unlock_irq(&udc->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	return snprintf(out, PAGE_SIZE, "%d\n", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static DEVICE_ATTR_RO(usbip_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static struct attribute *dev_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	&dev_attr_usbip_sockfd.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	&dev_attr_usbip_status.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static struct bin_attribute *dev_bin_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	&bin_attr_dev_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) static const struct attribute_group vudc_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	.attrs = dev_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	.bin_attrs = dev_bin_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) const struct attribute_group *vudc_groups[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	&vudc_attr_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) };