/**
* mei_wd_host_init - connect to the watchdog client
*
* @dev: the device structure
*
* returns -ENENT if wd client cannot be found
* -EIO if write has failed
* 0 on success
*/
int mei_wd_host_init(struct mei_device *dev)
{
struct mei_cl *cl = &dev->wd_cl;
int i;
int ret;
mei_cl_init(cl, dev);
dev->wd_timeout = MEI_WD_DEFAULT_TIMEOUT;
dev->wd_state = MEI_WD_IDLE;
/* check for valid client id */
i = mei_me_cl_by_uuid(dev, &mei_wd_guid);
if (i < 0) {
dev_info(&dev->pdev->dev, "wd: failed to find the client\n");
return -ENOENT;
}
cl->me_client_id = dev->me_clients[i].client_id;
ret = mei_cl_link(cl, MEI_WD_HOST_CLIENT_ID);
if (ret < 0) {
dev_info(&dev->pdev->dev, "wd: failed link client\n");
return -ENOENT;
}
cl->state = MEI_FILE_CONNECTING;
ret = mei_cl_connect(cl, NULL);
if (ret) {
dev_err(&dev->pdev->dev, "wd: failed to connect = %d\n", ret);
mei_cl_unlink(cl);
return ret;
}
ret = mei_watchdog_register(dev);
if (ret) {
mei_cl_disconnect(cl);
mei_cl_unlink(cl);
}
return ret;
}
static void mei_nfc_init(struct work_struct *work)
{
struct mei_device *dev;
struct mei_cl_device *cldev;
struct mei_nfc_dev *ndev;
struct mei_cl *cl_info;
ndev = container_of(work, struct mei_nfc_dev, init_work);
cl_info = ndev->cl_info;
dev = cl_info->dev;
mutex_lock(&dev->device_lock);
if (mei_cl_connect(cl_info, NULL) < 0) {
mutex_unlock(&dev->device_lock);
dev_err(dev->dev, "Could not connect to the NFC INFO ME client");
goto err;
}
mutex_unlock(&dev->device_lock);
if (mei_nfc_if_version(ndev) < 0) {
dev_err(dev->dev, "Could not get the NFC interface version");
goto err;
}
dev_info(dev->dev, "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n",
ndev->fw_ivn, ndev->vendor_id, ndev->radio_type);
mutex_lock(&dev->device_lock);
if (mei_cl_disconnect(cl_info) < 0) {
mutex_unlock(&dev->device_lock);
dev_err(dev->dev, "Could not disconnect the NFC INFO ME client");
goto err;
}
mutex_unlock(&dev->device_lock);
if (mei_nfc_build_bus_name(ndev) < 0) {
dev_err(dev->dev, "Could not build the bus ID name\n");
return;
}
cldev = mei_cl_add_device(dev, mei_nfc_guid, ndev->bus_name, &nfc_ops);
if (!cldev) {
dev_err(dev->dev, "Could not add the NFC device to the MEI bus\n");
goto err;
}
cldev->priv_data = ndev;
return;
err:
mutex_lock(&dev->device_lock);
mei_nfc_free(ndev);
mutex_unlock(&dev->device_lock);
}
/**
* mei_release - the release function
*
* @inode: pointer to inode structure
* @file: pointer to file structure
*
* returns 0 on success, <0 on error
*/
static int mei_release(struct inode *inode, struct file *file)
{
struct mei_cl *cl = file->private_data;
struct mei_cl_cb *cb;
struct mei_device *dev;
int rets = 0;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
dev = cl->dev;
mutex_lock(&dev->device_lock);
if (cl == &dev->iamthif_cl) {
rets = mei_amthif_release(dev, file);
goto out;
}
if (cl->state == MEI_FILE_CONNECTED) {
cl->state = MEI_FILE_DISCONNECTING;
dev_dbg(&dev->pdev->dev,
"disconnecting client host client = %d, "
"ME client = %d\n",
cl->host_client_id,
cl->me_client_id);
rets = mei_cl_disconnect(cl);
}
mei_cl_flush_queues(cl);
dev_dbg(&dev->pdev->dev, "remove client host client = %d, ME client = %d\n",
cl->host_client_id,
cl->me_client_id);
if (dev->open_handle_count > 0) {
clear_bit(cl->host_client_id, dev->host_clients_map);
dev->open_handle_count--;
}
mei_cl_unlink(cl);
/* free read cb */
cb = NULL;
if (cl->read_cb) {
cb = mei_cl_find_read_cb(cl);
/* Remove entry from read list */
if (cb)
list_del(&cb->list);
cb = cl->read_cb;
cl->read_cb = NULL;
}
file->private_data = NULL;
if (cb) {
mei_io_cb_free(cb);
cb = NULL;
}
kfree(cl);
out:
mutex_unlock(&dev->device_lock);
return rets;
}