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- /* drivers/usb/gadget/f_diag.c
- * Diag Function Device - Route ARM9 and ARM11 DIAG messages
- * between HOST and DEVICE.
- * Copyright (C) 2007 Google, Inc.
- * Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved.
- * Author: Brian Swetland <swetland@google.com>
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
- #include <linux/init.h>
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/platform_device.h>
- #include <mach/usbdiag.h>
- #include <linux/usb/composite.h>
- #include <linux/usb/gadget.h>
- #include <linux/workqueue.h>
- #include <linux/debugfs.h>
- static DEFINE_SPINLOCK(ch_lock);
- static LIST_HEAD(usb_diag_ch_list);
- static struct usb_interface_descriptor intf_desc = {
- .bLength = sizeof intf_desc,
- .bDescriptorType = USB_DT_INTERFACE,
- .bNumEndpoints = 2,
- .bInterfaceClass = 0xFF,
- #if defined(CONFIG_USB_ANDROID_SAMSUNG_COMPOSITE) || defined(CONFIG_SLP)
- .bInterfaceSubClass = 0x10,
- .bInterfaceProtocol = 0x01,
- #else
- .bInterfaceSubClass = 0xFF,
- .bInterfaceProtocol = 0xFF,
- #endif
- };
- static struct usb_endpoint_descriptor hs_bulk_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = __constant_cpu_to_le16(512),
- .bInterval = 0,
- };
- static struct usb_endpoint_descriptor fs_bulk_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = __constant_cpu_to_le16(64),
- .bInterval = 0,
- };
- static struct usb_endpoint_descriptor hs_bulk_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = __constant_cpu_to_le16(512),
- .bInterval = 0,
- };
- static struct usb_endpoint_descriptor fs_bulk_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = __constant_cpu_to_le16(64),
- .bInterval = 0,
- };
- static struct usb_descriptor_header *fs_diag_desc[] = {
- (struct usb_descriptor_header *) &intf_desc,
- (struct usb_descriptor_header *) &fs_bulk_in_desc,
- (struct usb_descriptor_header *) &fs_bulk_out_desc,
- NULL,
- };
- static struct usb_descriptor_header *hs_diag_desc[] = {
- (struct usb_descriptor_header *) &intf_desc,
- (struct usb_descriptor_header *) &hs_bulk_in_desc,
- (struct usb_descriptor_header *) &hs_bulk_out_desc,
- NULL,
- };
- /**
- * struct diag_context - USB diag function driver private structure
- * @function: function structure for USB interface
- * @out: USB OUT endpoint struct
- * @in: USB IN endpoint struct
- * @in_desc: USB IN endpoint descriptor struct
- * @out_desc: USB OUT endpoint descriptor struct
- * @read_pool: List of requests used for Rx (OUT ep)
- * @write_pool: List of requests used for Tx (IN ep)
- * @config_work: Work item schedule after interface is configured to notify
- * CONNECT event to diag char driver and updating product id
- * and serial number to MODEM/IMEM.
- * @lock: Spinlock to proctect read_pool, write_pool lists
- * @cdev: USB composite device struct
- * @ch: USB diag channel
- *
- */
- struct diag_context {
- struct usb_function function;
- struct usb_ep *out;
- struct usb_ep *in;
- struct usb_endpoint_descriptor *in_desc;
- struct usb_endpoint_descriptor *out_desc;
- struct list_head read_pool;
- struct list_head write_pool;
- struct work_struct config_work;
- spinlock_t lock;
- unsigned configured;
- struct usb_composite_dev *cdev;
- int (*update_pid_and_serial_num)(uint32_t, const char *);
- struct usb_diag_ch ch;
- /* pkt counters */
- unsigned long dpkts_tolaptop;
- unsigned long dpkts_tomodem;
- unsigned dpkts_tolaptop_pending;
- // zero_pky.patch by jagadish
- bool qxdm_ops;
- };
- static inline struct diag_context *func_to_diag(struct usb_function *f)
- {
- return container_of(f, struct diag_context, function);
- }
- static void usb_config_work_func(struct work_struct *work)
- {
- struct diag_context *ctxt = container_of(work,
- struct diag_context, config_work);
- struct usb_composite_dev *cdev = ctxt->cdev;
- struct usb_gadget_strings *table;
- struct usb_string *s;
- if (ctxt->ch.notify)
- {
- ctxt->ch.notify(ctxt->ch.priv, USB_DIAG_CONNECT, NULL);
- // zero_pky.patch by jagadish
- ctxt->qxdm_ops = 0;
- }
- }
- static void diag_write_complete(struct usb_ep *ep,
- struct usb_request *req)
- {
- struct diag_context *ctxt = ep->driver_data;
- struct diag_request *d_req = req->context;
- unsigned long flags;
- ctxt->dpkts_tolaptop_pending--;
- if (!req->status) {
- if ((req->length >= ep->maxpacket) &&
- ((req->length % ep->maxpacket) == 0)) {
- ctxt->dpkts_tolaptop_pending++;
- req->length = 0;
- d_req->actual = req->actual;
- d_req->status = req->status;
- /* Queue zero length packet */
- usb_ep_queue(ctxt->in, req, GFP_ATOMIC);
- return;
- }
- }
- spin_lock_irqsave(&ctxt->lock, flags);
- list_add_tail(&req->list, &ctxt->write_pool);
- if (req->length != 0) {
- d_req->actual = req->actual;
- d_req->status = req->status;
- }
- spin_unlock_irqrestore(&ctxt->lock, flags);
- if (ctxt->ch.notify) {
- // zero_pky.patch by jagadish
- ctxt->qxdm_ops = 1;
- ctxt->ch.notify(ctxt->ch.priv, USB_DIAG_WRITE_DONE, d_req);
- }
- }
- static void diag_read_complete(struct usb_ep *ep,
- struct usb_request *req)
- {
- struct diag_context *ctxt = ep->driver_data;
- struct diag_request *d_req = req->context;
- unsigned long flags;
- d_req->actual = req->actual;
- d_req->status = req->status;
- spin_lock_irqsave(&ctxt->lock, flags);
- list_add_tail(&req->list, &ctxt->read_pool);
- spin_unlock_irqrestore(&ctxt->lock, flags);
- ctxt->dpkts_tomodem++;
- if (ctxt->ch.notify) {
- // zero_pky.patch by jagadish
- ctxt->qxdm_ops = 1;
- ctxt->ch.notify(ctxt->ch.priv, USB_DIAG_READ_DONE, d_req);
- }
- }
- /**
- * usb_diag_open() - Open a diag channel over USB
- * @name: Name of the channel
- * @priv: Private structure pointer which will be passed in notify()
- * @notify: Callback function to receive notifications
- *
- * This function iterates overs the available channels and returns
- * the channel handler if the name matches. The notify callback is called
- * for CONNECT, DISCONNECT, READ_DONE and WRITE_DONE events.
- *
- */
- struct usb_diag_ch *usb_diag_open(const char *name, void *priv,
- void (*notify)(void *, unsigned, struct diag_request *))
- {
- struct usb_diag_ch *ch;
- struct diag_context *ctxt;
- unsigned long flags;
- int found = 0;
- spin_lock_irqsave(&ch_lock, flags);
- /* Check if we already have a channel with this name */
- list_for_each_entry(ch, &usb_diag_ch_list, list) {
- if (!strcmp(name, ch->name)) {
- found = 1;
- break;
- }
- }
- spin_unlock_irqrestore(&ch_lock, flags);
- if (!found) {
- ctxt = kzalloc(sizeof(*ctxt), GFP_KERNEL);
- if (!ctxt)
- return ERR_PTR(-ENOMEM);
- ch = &ctxt->ch;
- }
- ch->name = name;
- ch->priv = priv;
- ch->notify = notify;
- spin_lock_irqsave(&ch_lock, flags);
- list_add_tail(&ch->list, &usb_diag_ch_list);
- spin_unlock_irqrestore(&ch_lock, flags);
- return ch;
- }
- EXPORT_SYMBOL(usb_diag_open);
- /**
- * usb_diag_close() - Close a diag channel over USB
- * @ch: Channel handler
- *
- * This function closes the diag channel.
- *
- */
- void usb_diag_close(struct usb_diag_ch *ch)
- {
- struct diag_context *dev = container_of(ch, struct diag_context, ch);
- unsigned long flags;
- spin_lock_irqsave(&ch_lock, flags);
- ch->priv = NULL;
- ch->notify = NULL;
- /* Free-up the resources if channel is no more active */
- if (!ch->priv_usb) {
- list_del(&ch->list);
- kfree(dev);
- }
- spin_unlock_irqrestore(&ch_lock, flags);
- }
- EXPORT_SYMBOL(usb_diag_close);
- /**
- * usb_diag_free_req() - Free USB requests
- * @ch: Channel handler
- *
- * This function free read and write USB requests for the interface
- * associated with this channel.
- *
- */
- void usb_diag_free_req(struct usb_diag_ch *ch)
- {
- struct diag_context *ctxt = ch->priv_usb;
- struct usb_request *req;
- struct list_head *act, *tmp;
- if (!ctxt)
- return;
- list_for_each_safe(act, tmp, &ctxt->write_pool) {
- req = list_entry(act, struct usb_request, list);
- list_del(&req->list);
- usb_ep_free_request(ctxt->in, req);
- }
- list_for_each_safe(act, tmp, &ctxt->read_pool) {
- req = list_entry(act, struct usb_request, list);
- list_del(&req->list);
- usb_ep_free_request(ctxt->out, req);
- }
- }
- EXPORT_SYMBOL(usb_diag_free_req);
- /**
- * usb_diag_alloc_req() - Allocate USB requests
- * @ch: Channel handler
- * @n_write: Number of requests for Tx
- * @n_read: Number of requests for Rx
- *
- * This function allocate read and write USB requests for the interface
- * associated with this channel. The actual buffer is not allocated.
- * The buffer is passed by diag char driver.
- *
- */
- int usb_diag_alloc_req(struct usb_diag_ch *ch, int n_write, int n_read)
- {
- struct diag_context *ctxt = ch->priv_usb;
- struct usb_request *req;
- int i;
- if (!ctxt)
- return -ENODEV;
- for (i = 0; i < n_write; i++) {
- req = usb_ep_alloc_request(ctxt->in, GFP_ATOMIC);
- if (!req)
- goto fail;
- req->complete = diag_write_complete;
- list_add_tail(&req->list, &ctxt->write_pool);
- }
- for (i = 0; i < n_read; i++) {
- req = usb_ep_alloc_request(ctxt->out, GFP_ATOMIC);
- if (!req)
- goto fail;
- req->complete = diag_read_complete;
- list_add_tail(&req->list, &ctxt->read_pool);
- }
- return 0;
- fail:
- usb_diag_free_req(ch);
- return -ENOMEM;
- }
- EXPORT_SYMBOL(usb_diag_alloc_req);
- /**
- * usb_diag_read() - Read data from USB diag channel
- * @ch: Channel handler
- * @d_req: Diag request struct
- *
- * Enqueue a request on OUT endpoint of the interface corresponding to this
- * channel. This function returns proper error code when interface is not
- * in configured state, no Rx requests available and ep queue is failed.
- *
- * This function operates asynchronously. READ_DONE event is notified after
- * completion of OUT request.
- *
- */
- int usb_diag_read(struct usb_diag_ch *ch, struct diag_request *d_req)
- {
- struct diag_context *ctxt = ch->priv_usb;
- unsigned long flags;
- struct usb_request *req;
- if (!ctxt)
- return -ENODEV;
- spin_lock_irqsave(&ctxt->lock, flags);
- if (!ctxt->configured) {
- spin_unlock_irqrestore(&ctxt->lock, flags);
- return -EIO;
- }
- if (list_empty(&ctxt->read_pool)) {
- spin_unlock_irqrestore(&ctxt->lock, flags);
- ERROR(ctxt->cdev, "%s: no requests available\n", __func__);
- return -EAGAIN;
- }
- req = list_first_entry(&ctxt->read_pool, struct usb_request, list);
- list_del(&req->list);
- spin_unlock_irqrestore(&ctxt->lock, flags);
- req->buf = d_req->buf;
- req->length = d_req->length;
- req->context = d_req;
- if (usb_ep_queue(ctxt->out, req, GFP_ATOMIC)) {
- /* If error add the link to linked list again*/
- spin_lock_irqsave(&ctxt->lock, flags);
- list_add_tail(&req->list, &ctxt->read_pool);
- spin_unlock_irqrestore(&ctxt->lock, flags);
- ERROR(ctxt->cdev, "%s: cannot queue"
- " read request\n", __func__);
- return -EIO;
- }
- return 0;
- }
- EXPORT_SYMBOL(usb_diag_read);
- /**
- * usb_diag_write() - Write data from USB diag channel
- * @ch: Channel handler
- * @d_req: Diag request struct
- *
- * Enqueue a request on IN endpoint of the interface corresponding to this
- * channel. This function returns proper error code when interface is not
- * in configured state, no Tx requests available and ep queue is failed.
- *
- * This function operates asynchronously. WRITE_DONE event is notified after
- * completion of IN request.
- *
- */
- int usb_diag_write(struct usb_diag_ch *ch, struct diag_request *d_req)
- {
- struct diag_context *ctxt = ch->priv_usb;
- unsigned long flags;
- struct usb_request *req = NULL;
- if (!ctxt)
- return -ENODEV;
- spin_lock_irqsave(&ctxt->lock, flags);
- if (!ctxt->configured) {
- spin_unlock_irqrestore(&ctxt->lock, flags);
- return -EIO;
- }
- if (list_empty(&ctxt->write_pool)) {
- spin_unlock_irqrestore(&ctxt->lock, flags);
- ERROR(ctxt->cdev, "%s: no requests available\n", __func__);
- return -EAGAIN;
- }
- req = list_first_entry(&ctxt->write_pool, struct usb_request, list);
- list_del(&req->list);
- spin_unlock_irqrestore(&ctxt->lock, flags);
- req->buf = d_req->buf;
- req->length = d_req->length;
- req->context = d_req;
- if (usb_ep_queue(ctxt->in, req, GFP_ATOMIC)) {
- /* If error add the link to linked list again*/
- spin_lock_irqsave(&ctxt->lock, flags);
- list_add_tail(&req->list, &ctxt->write_pool);
- spin_unlock_irqrestore(&ctxt->lock, flags);
- ERROR(ctxt->cdev, "%s: cannot queue"
- " read request\n", __func__);
- return -EIO;
- }
- ctxt->dpkts_tolaptop++;
- ctxt->dpkts_tolaptop_pending++;
- return 0;
- }
- EXPORT_SYMBOL(usb_diag_write);
- static void diag_function_disable(struct usb_function *f)
- {
- struct diag_context *dev = func_to_diag(f);
- unsigned long flags;
- DBG(dev->cdev, "diag_function_disable\n");
- spin_lock_irqsave(&dev->lock, flags);
- dev->configured = 0;
- spin_unlock_irqrestore(&dev->lock, flags);
- // zero_pky.patch by jagadish
- if (dev->ch.notify) {
- if (dev->qxdm_ops)
- dev->ch.notify(dev->ch.priv, USB_DIAG_QXDM_DISCONNECT, NULL);
- else
- dev->ch.notify(dev->ch.priv, USB_DIAG_DISCONNECT, NULL);
- dev->qxdm_ops = 0;
- }
- usb_ep_disable(dev->in);
- dev->in->driver_data = NULL;
- usb_ep_disable(dev->out);
- dev->out->driver_data = NULL;
- }
- static int diag_function_set_alt(struct usb_function *f,
- unsigned intf, unsigned alt)
- {
- struct diag_context *dev = func_to_diag(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- unsigned long flags;
- int rc = 0;
- dev->in_desc = ep_choose(cdev->gadget,
- (struct usb_endpoint_descriptor *)f->hs_descriptors[1],
- (struct usb_endpoint_descriptor *)f->descriptors[1]);
- dev->out_desc = ep_choose(cdev->gadget,
- (struct usb_endpoint_descriptor *)f->hs_descriptors[2],
- (struct usb_endpoint_descriptor *)f->descriptors[2]);
- dev->in->driver_data = dev;
- rc = usb_ep_enable(dev->in, dev->in_desc);
- if (rc) {
- ERROR(dev->cdev, "can't enable %s, result %d\n",
- dev->in->name, rc);
- return rc;
- }
- dev->out->driver_data = dev;
- rc = usb_ep_enable(dev->out, dev->out_desc);
- if (rc) {
- ERROR(dev->cdev, "can't enable %s, result %d\n",
- dev->out->name, rc);
- usb_ep_disable(dev->in);
- return rc;
- }
- schedule_work(&dev->config_work);
- dev->dpkts_tolaptop = 0;
- dev->dpkts_tomodem = 0;
- dev->dpkts_tolaptop_pending = 0;
- spin_lock_irqsave(&dev->lock, flags);
- dev->configured = 1;
- spin_unlock_irqrestore(&dev->lock, flags);
- return rc;
- }
- static void diag_function_unbind(struct usb_configuration *c,
- struct usb_function *f)
- {
- struct diag_context *ctxt = func_to_diag(f);
- if (gadget_is_dualspeed(c->cdev->gadget))
- usb_free_descriptors(f->hs_descriptors);
- usb_free_descriptors(f->descriptors);
- ctxt->ch.priv_usb = NULL;
- }
- static int diag_function_bind(struct usb_configuration *c,
- struct usb_function *f)
- {
- struct usb_composite_dev *cdev = c->cdev;
- struct diag_context *ctxt = func_to_diag(f);
- struct usb_ep *ep;
- int status = -ENODEV;
- intf_desc.bInterfaceNumber = usb_interface_id(c, f);
- ep = usb_ep_autoconfig(cdev->gadget, &fs_bulk_in_desc);
- if (!ep)
- goto fail;
- ctxt->in = ep;
- ep->driver_data = ctxt;
- ep = usb_ep_autoconfig(cdev->gadget, &fs_bulk_out_desc);
- if (!ep)
- goto fail;
- ctxt->out = ep;
- ep->driver_data = ctxt;
- /* copy descriptors, and track endpoint copies */
- f->descriptors = usb_copy_descriptors(fs_diag_desc);
- if (!f->descriptors)
- goto fail;
- if (gadget_is_dualspeed(c->cdev->gadget)) {
- hs_bulk_in_desc.bEndpointAddress =
- fs_bulk_in_desc.bEndpointAddress;
- hs_bulk_out_desc.bEndpointAddress =
- fs_bulk_out_desc.bEndpointAddress;
- /* copy descriptors, and track endpoint copies */
- f->hs_descriptors = usb_copy_descriptors(hs_diag_desc);
- }
- return 0;
- fail:
- if (ctxt->out)
- ctxt->out->driver_data = NULL;
- if (ctxt->in)
- ctxt->in->driver_data = NULL;
- return status;
- }
- int diag_function_add(struct usb_configuration *c, const char *name,
- int (*update_pid)(uint32_t, const char *))
- {
- struct diag_context *dev;
- struct usb_diag_ch *_ch;
- int found = 0, ret;
- DBG(c->cdev, "diag_function_add\n");
- list_for_each_entry(_ch, &usb_diag_ch_list, list) {
- if (!strcmp(name, _ch->name)) {
- found = 1;
- break;
- }
- }
- if (!found) {
- ERROR(c->cdev, "usb: unable to get diag usb channel\n");
- return -ENODEV;
- }
- dev = container_of(_ch, struct diag_context, ch);
- /* claim the channel for this USB interface */
- _ch->priv_usb = dev;
- dev->update_pid_and_serial_num = update_pid;
- dev->cdev = c->cdev;
- dev->function.name = _ch->name;
- dev->function.descriptors = fs_diag_desc;
- dev->function.hs_descriptors = hs_diag_desc;
- dev->function.bind = diag_function_bind;
- dev->function.unbind = diag_function_unbind;
- dev->function.set_alt = diag_function_set_alt;
- dev->function.disable = diag_function_disable;
- spin_lock_init(&dev->lock);
- INIT_LIST_HEAD(&dev->read_pool);
- INIT_LIST_HEAD(&dev->write_pool);
- INIT_WORK(&dev->config_work, usb_config_work_func);
- ret = usb_add_function(c, &dev->function);
- if (ret) {
- INFO(c->cdev, "usb_add_function failed\n");
- _ch->priv_usb = NULL;
- }
- return ret;
- }
- #if defined(CONFIG_DEBUG_FS)
- static char debug_buffer[PAGE_SIZE];
- static ssize_t debug_read_stats(struct file *file, char __user *ubuf,
- size_t count, loff_t *ppos)
- {
- char *buf = debug_buffer;
- int temp = 0;
- struct usb_diag_ch *ch;
- list_for_each_entry(ch, &usb_diag_ch_list, list) {
- struct diag_context *ctxt;
- ctxt = ch->priv_usb;
- temp += scnprintf(buf + temp, PAGE_SIZE - temp,
- "---Name: %s---\n"
- "endpoints: %s, %s\n"
- "dpkts_tolaptop: %lu\n"
- "dpkts_tomodem: %lu\n"
- "pkts_tolaptop_pending: %u\n",
- ch->name,
- ctxt->in->name, ctxt->out->name,
- ctxt->dpkts_tolaptop,
- ctxt->dpkts_tomodem,
- ctxt->dpkts_tolaptop_pending);
- }
- return simple_read_from_buffer(ubuf, count, ppos, buf, temp);
- }
- static ssize_t debug_reset_stats(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
- {
- struct usb_diag_ch *ch;
- list_for_each_entry(ch, &usb_diag_ch_list, list) {
- struct diag_context *ctxt;
- ctxt = ch->priv_usb;
- ctxt->dpkts_tolaptop = 0;
- ctxt->dpkts_tomodem = 0;
- ctxt->dpkts_tolaptop_pending = 0;
- }
- return count;
- }
- static int debug_open(struct inode *inode, struct file *file)
- {
- return 0;
- }
- static const struct file_operations debug_fdiag_ops = {
- .open = debug_open,
- .read = debug_read_stats,
- .write = debug_reset_stats,
- };
- struct dentry *dent_diag;
- static void fdiag_debugfs_init(void)
- {
- dent_diag = debugfs_create_dir("usb_diag", 0);
- if (IS_ERR(dent_diag))
- return;
- debugfs_create_file("status", 0444, dent_diag, 0, &debug_fdiag_ops);
- }
- #else
- static void fdiag_debugfs_init(void)
- {
- return;
- }
- #endif
- static void diag_cleanup(void)
- {
- struct diag_context *dev;
- struct list_head *act, *tmp;
- struct usb_diag_ch *_ch;
- unsigned long flags;
- debugfs_remove_recursive(dent_diag);
- list_for_each_safe(act, tmp, &usb_diag_ch_list) {
- _ch = list_entry(act, struct usb_diag_ch, list);
- dev = container_of(_ch, struct diag_context, ch);
- spin_lock_irqsave(&ch_lock, flags);
- /* Free if diagchar is not using the channel anymore */
- if (!_ch->priv) {
- list_del(&_ch->list);
- kfree(dev);
- }
- spin_unlock_irqrestore(&ch_lock, flags);
- }
- }
- static int diag_setup(void)
- {
- fdiag_debugfs_init();
- return 0;
- }
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