Orange Pi5 kernel

Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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^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) 2003-2008 Takahiro Hirofuchi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/kthread.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include "usbip_common.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include "stub.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * usbip_status shows the status of usbip-host as long as this driver is bound
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * to the target device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) static ssize_t usbip_status_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 				 struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	struct stub_device *sdev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	if (!sdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 		dev_err(dev, "sdev is null\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	spin_lock_irq(&sdev->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	status = sdev->ud.status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	spin_unlock_irq(&sdev->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	return snprintf(buf, PAGE_SIZE, "%d\n", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) static DEVICE_ATTR_RO(usbip_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38)  * usbip_sockfd gets a socket descriptor of an established TCP connection that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39)  * is used to transfer usbip requests by kernel threads. -1 is a magic number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  * by which usbip connection is finished.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) static ssize_t usbip_sockfd_store(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 			    const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	struct stub_device *sdev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	int sockfd = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	struct socket *socket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct task_struct *tcp_rx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct task_struct *tcp_tx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	if (!sdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		dev_err(dev, "sdev is null\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	rv = sscanf(buf, "%d", &sockfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	if (rv != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	if (sockfd != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		dev_info(dev, "stub up\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		mutex_lock(&sdev->ud.sysfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		spin_lock_irq(&sdev->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		if (sdev->ud.status != SDEV_ST_AVAILABLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 			dev_err(dev, "not ready\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 			goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		socket = sockfd_lookup(sockfd, &err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		if (!socket) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 			dev_err(dev, "failed to lookup sock");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 			goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		if (socket->type != SOCK_STREAM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 			dev_err(dev, "Expecting SOCK_STREAM - found %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 				socket->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 			goto sock_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		/* unlock and create threads and get tasks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		spin_unlock_irq(&sdev->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		tcp_rx = kthread_create(stub_rx_loop, &sdev->ud, "stub_rx");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		if (IS_ERR(tcp_rx)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			sockfd_put(socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			goto unlock_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		tcp_tx = kthread_create(stub_tx_loop, &sdev->ud, "stub_tx");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		if (IS_ERR(tcp_tx)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			kthread_stop(tcp_rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			sockfd_put(socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			goto unlock_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		/* get task structs now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		get_task_struct(tcp_rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		get_task_struct(tcp_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		/* lock and update sdev->ud state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		spin_lock_irq(&sdev->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		sdev->ud.tcp_socket = socket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		sdev->ud.sockfd = sockfd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		sdev->ud.tcp_rx = tcp_rx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		sdev->ud.tcp_tx = tcp_tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		sdev->ud.status = SDEV_ST_USED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		spin_unlock_irq(&sdev->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		wake_up_process(sdev->ud.tcp_rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		wake_up_process(sdev->ud.tcp_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		mutex_unlock(&sdev->ud.sysfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		dev_info(dev, "stub down\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		spin_lock_irq(&sdev->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		if (sdev->ud.status != SDEV_ST_USED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		spin_unlock_irq(&sdev->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		usbip_event_add(&sdev->ud, SDEV_EVENT_DOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		mutex_unlock(&sdev->ud.sysfs_lock);
^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) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) sock_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	sockfd_put(socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	spin_unlock_irq(&sdev->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) unlock_mutex:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	mutex_unlock(&sdev->ud.sysfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static DEVICE_ATTR_WO(usbip_sockfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static struct attribute *usbip_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	&dev_attr_usbip_status.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	&dev_attr_usbip_sockfd.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	&dev_attr_usbip_debug.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) ATTRIBUTE_GROUPS(usbip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static void stub_shutdown_connection(struct usbip_device *ud)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	struct stub_device *sdev = container_of(ud, struct stub_device, ud);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	 * When removing an exported device, kernel panic sometimes occurred
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	 * and then EIP was sk_wait_data of stub_rx thread. Is this because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	 * sk_wait_data returned though stub_rx thread was already finished by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	 * step 1?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	if (ud->tcp_socket) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		dev_dbg(&sdev->udev->dev, "shutdown sockfd %d\n", ud->sockfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	/* 1. stop threads */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (ud->tcp_rx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		kthread_stop_put(ud->tcp_rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		ud->tcp_rx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	if (ud->tcp_tx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		kthread_stop_put(ud->tcp_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		ud->tcp_tx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	 * 2. close the socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	 * tcp_socket is freed after threads are killed so that usbip_xmit does
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	 * not touch NULL socket.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	if (ud->tcp_socket) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		sockfd_put(ud->tcp_socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		ud->tcp_socket = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		ud->sockfd = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	/* 3. free used data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	stub_device_cleanup_urbs(sdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	/* 4. free stub_unlink */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		struct stub_unlink *unlink, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		spin_lock_irqsave(&sdev->priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		list_for_each_entry_safe(unlink, tmp, &sdev->unlink_tx, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 			list_del(&unlink->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 			kfree(unlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		list_for_each_entry_safe(unlink, tmp, &sdev->unlink_free,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 					 list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 			list_del(&unlink->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 			kfree(unlink);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		spin_unlock_irqrestore(&sdev->priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static void stub_device_reset(struct usbip_device *ud)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	struct stub_device *sdev = container_of(ud, struct stub_device, ud);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	struct usb_device *udev = sdev->udev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	dev_dbg(&udev->dev, "device reset");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	ret = usb_lock_device_for_reset(udev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		dev_err(&udev->dev, "lock for reset\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		spin_lock_irq(&ud->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		ud->status = SDEV_ST_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		spin_unlock_irq(&ud->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	/* try to reset the device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	ret = usb_reset_device(udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	usb_unlock_device(udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	spin_lock_irq(&ud->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		dev_err(&udev->dev, "device reset\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		ud->status = SDEV_ST_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		dev_info(&udev->dev, "device reset\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		ud->status = SDEV_ST_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	spin_unlock_irq(&ud->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static void stub_device_unusable(struct usbip_device *ud)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	spin_lock_irq(&ud->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	ud->status = SDEV_ST_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	spin_unlock_irq(&ud->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)  * stub_device_alloc - allocate a new stub_device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)  * @udev: usb_device of a new device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)  * Allocates and initializes a new stub_device struct.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static struct stub_device *stub_device_alloc(struct usb_device *udev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	struct stub_device *sdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	int busnum = udev->bus->busnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	int devnum = udev->devnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	dev_dbg(&udev->dev, "allocating stub device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	/* yes, it's a new device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	sdev = kzalloc(sizeof(struct stub_device), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	if (!sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	sdev->udev = usb_get_dev(udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	 * devid is defined with devnum when this driver is first allocated.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	 * devnum may change later if a device is reset. However, devid never
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	 * changes during a usbip connection.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	sdev->devid		= (busnum << 16) | devnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	sdev->ud.side		= USBIP_STUB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	sdev->ud.status		= SDEV_ST_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	spin_lock_init(&sdev->ud.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	mutex_init(&sdev->ud.sysfs_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	sdev->ud.tcp_socket	= NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	sdev->ud.sockfd		= -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	INIT_LIST_HEAD(&sdev->priv_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	INIT_LIST_HEAD(&sdev->priv_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	INIT_LIST_HEAD(&sdev->priv_free);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	INIT_LIST_HEAD(&sdev->unlink_free);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	INIT_LIST_HEAD(&sdev->unlink_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	spin_lock_init(&sdev->priv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	init_waitqueue_head(&sdev->tx_waitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	sdev->ud.eh_ops.shutdown = stub_shutdown_connection;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	sdev->ud.eh_ops.reset    = stub_device_reset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	sdev->ud.eh_ops.unusable = stub_device_unusable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	usbip_start_eh(&sdev->ud);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	dev_dbg(&udev->dev, "register new device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	return sdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static void stub_device_free(struct stub_device *sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	kfree(sdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) static int stub_probe(struct usb_device *udev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	struct stub_device *sdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	const char *udev_busid = dev_name(&udev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	struct bus_id_priv *busid_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	char save_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	dev_dbg(&udev->dev, "Enter probe\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	/* Not sure if this is our device. Allocate here to avoid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	 * calling alloc while holding busid_table lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	sdev = stub_device_alloc(udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	if (!sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	/* check we should claim or not by busid_table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	busid_priv = get_busid_priv(udev_busid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	if (!busid_priv || (busid_priv->status == STUB_BUSID_REMOV) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	    (busid_priv->status == STUB_BUSID_OTHER)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		dev_info(&udev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 			"%s is not in match_busid table... skip!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 			udev_busid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		 * Return value should be ENODEV or ENOXIO to continue trying
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		 * other matched drivers by the driver core.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		 * See driver_probe_device() in driver/base/dd.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 		rc = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 		if (!busid_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 			goto sdev_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		goto call_put_busid_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		dev_dbg(&udev->dev, "%s is a usb hub device... skip!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 			 udev_busid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		rc = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		goto call_put_busid_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	if (!strcmp(udev->bus->bus_name, "vhci_hcd")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 		dev_dbg(&udev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 			"%s is attached on vhci_hcd... skip!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 			udev_busid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 		rc = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 		goto call_put_busid_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	dev_info(&udev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 		"usbip-host: register new device (bus %u dev %u)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 		udev->bus->busnum, udev->devnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	busid_priv->shutdown_busid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	/* set private data to usb_device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	dev_set_drvdata(&udev->dev, sdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	busid_priv->sdev = sdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	busid_priv->udev = udev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	save_status = busid_priv->status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	busid_priv->status = STUB_BUSID_ALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	/* release the busid_lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	put_busid_priv(busid_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	 * Claim this hub port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	 * It doesn't matter what value we pass as owner
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	 * (struct dev_state) as long as it is unique.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	rc = usb_hub_claim_port(udev->parent, udev->portnum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 			(struct usb_dev_state *) udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 		dev_dbg(&udev->dev, "unable to claim port\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 		goto err_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) err_port:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	dev_set_drvdata(&udev->dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	usb_put_dev(udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	/* we already have busid_priv, just lock busid_lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	spin_lock(&busid_priv->busid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	busid_priv->sdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	busid_priv->status = save_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 	spin_unlock(&busid_priv->busid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	/* lock is released - go to free */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	goto sdev_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) call_put_busid_priv:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 	/* release the busid_lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	put_busid_priv(busid_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) sdev_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 	stub_device_free(sdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) static void shutdown_busid(struct bus_id_priv *busid_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 	usbip_event_add(&busid_priv->sdev->ud, SDEV_EVENT_REMOVED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 	/* wait for the stop of the event handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	usbip_stop_eh(&busid_priv->sdev->ud);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)  * called in usb_disconnect() or usb_deregister()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)  * but only if actconfig(active configuration) exists
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) static void stub_disconnect(struct usb_device *udev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 	struct stub_device *sdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 	const char *udev_busid = dev_name(&udev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 	struct bus_id_priv *busid_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	dev_dbg(&udev->dev, "Enter disconnect\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	busid_priv = get_busid_priv(udev_busid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 	if (!busid_priv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 		BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	sdev = dev_get_drvdata(&udev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	/* get stub_device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 	if (!sdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 		dev_err(&udev->dev, "could not get device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 		/* release busid_lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 		put_busid_priv(busid_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 	dev_set_drvdata(&udev->dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 	/* release busid_lock before call to remove device files */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 	put_busid_priv(busid_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 	 * NOTE: rx/tx threads are invoked for each usb_device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 	/* release port */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	rc = usb_hub_release_port(udev->parent, udev->portnum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 				  (struct usb_dev_state *) udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 	if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 		dev_dbg(&udev->dev, "unable to release port\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 	/* If usb reset is called from event handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 	if (usbip_in_eh(current))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 	/* we already have busid_priv, just lock busid_lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 	spin_lock(&busid_priv->busid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 	if (!busid_priv->shutdown_busid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 		busid_priv->shutdown_busid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 	/* release busid_lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 	spin_unlock(&busid_priv->busid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 	/* shutdown the current connection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 	shutdown_busid(busid_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 	usb_put_dev(sdev->udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 	/* we already have busid_priv, just lock busid_lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 	spin_lock(&busid_priv->busid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 	/* free sdev */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) 	busid_priv->sdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 	stub_device_free(sdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 	if (busid_priv->status == STUB_BUSID_ALLOC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 		busid_priv->status = STUB_BUSID_ADDED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 	/* release busid_lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 	spin_unlock(&busid_priv->busid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) 	return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) /* These functions need usb_port_suspend and usb_port_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)  * which reside in drivers/usb/core/usb.h. Skip for now. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) static int stub_suspend(struct usb_device *udev, pm_message_t message)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) 	dev_dbg(&udev->dev, "stub_suspend\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) static int stub_resume(struct usb_device *udev, pm_message_t message)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) 	dev_dbg(&udev->dev, "stub_resume\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) #endif	/* CONFIG_PM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) struct usb_device_driver stub_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) 	.name		= "usbip-host",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) 	.probe		= stub_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) 	.disconnect	= stub_disconnect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) 	.suspend	= stub_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) 	.resume		= stub_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) 	.supports_autosuspend	=	0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) 	.dev_groups	= usbip_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) };