C++ (Cpp) ilo_ccb_close Examples

Example #1

File: hpilo.c Project: Dashiee023/android_kernel_wiko_rainbow

static int ilo_close(struct inode *ip, struct file *fp)
{
	int slot;
	struct ccb_data *data;
	struct ilo_hwinfo *hw;
	unsigned long flags;

	slot = iminor(ip) % MAX_CCB;
	hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);

	spin_lock(&hw->open_lock);

	if (hw->ccb_alloc[slot]->ccb_cnt == 1) {

		data = fp->private_data;

		spin_lock_irqsave(&hw->alloc_lock, flags);
		hw->ccb_alloc[slot] = NULL;
		spin_unlock_irqrestore(&hw->alloc_lock, flags);

		ilo_ccb_close(hw->ilo_dev, data);

		kfree(data);
	} else
		hw->ccb_alloc[slot]->ccb_cnt--;

	spin_unlock(&hw->open_lock);

	return 0;
}

Example #2

File: hpilo.c Project: Dashiee023/android_kernel_wiko_rainbow

static int ilo_open(struct inode *ip, struct file *fp)
{
	int slot, error;
	struct ccb_data *data;
	struct ilo_hwinfo *hw;
	unsigned long flags;

	slot = iminor(ip) % MAX_CCB;
	hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);

	/* new ccb allocation */
	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	spin_lock(&hw->open_lock);

	/* each fd private_data holds sw/hw view of ccb */
	if (hw->ccb_alloc[slot] == NULL) {
		/* create a channel control block for this minor */
		error = ilo_ccb_setup(hw, data, slot);
		if (error) {
			kfree(data);
			goto out;
		}

		data->ccb_cnt = 1;
		data->ccb_excl = fp->f_flags & O_EXCL;
		data->ilo_hw = hw;
		init_waitqueue_head(&data->ccb_waitq);

		/* write the ccb to hw */
		spin_lock_irqsave(&hw->alloc_lock, flags);
		ilo_ccb_open(hw, data, slot);
		hw->ccb_alloc[slot] = data;
		spin_unlock_irqrestore(&hw->alloc_lock, flags);

		/* make sure the channel is functional */
		error = ilo_ccb_verify(hw, data);
		if (error) {

			spin_lock_irqsave(&hw->alloc_lock, flags);
			hw->ccb_alloc[slot] = NULL;
			spin_unlock_irqrestore(&hw->alloc_lock, flags);

			ilo_ccb_close(hw->ilo_dev, data);

			kfree(data);
			goto out;
		}

	} else {
		kfree(data);
		if (fp->f_flags & O_EXCL || hw->ccb_alloc[slot]->ccb_excl) {
			/*
			 * The channel exists, and either this open
			 * or a previous open of this channel wants
			 * exclusive access.
			 */
			error = -EBUSY;
		} else {
			hw->ccb_alloc[slot]->ccb_cnt++;
			error = 0;
		}
	}
out:
	spin_unlock(&hw->open_lock);

	if (!error)
		fp->private_data = hw->ccb_alloc[slot];

	return error;
}

Example #3

File: hpilo.c Project: romanbb/android_kernel_lge_d851

static int ilo_open(struct inode *ip, struct file *fp)
{
	int slot, error;
	struct ccb_data *data;
	struct ilo_hwinfo *hw;
	unsigned long flags;

	slot = iminor(ip) % MAX_CCB;
	hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);

	/*                    */
	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	spin_lock(&hw->open_lock);

	/*                                              */
	if (hw->ccb_alloc[slot] == NULL) {
		/*                                               */
		error = ilo_ccb_setup(hw, data, slot);
		if (error) {
			kfree(data);
			goto out;
		}

		data->ccb_cnt = 1;
		data->ccb_excl = fp->f_flags & O_EXCL;
		data->ilo_hw = hw;
		init_waitqueue_head(&data->ccb_waitq);

		/*                     */
		spin_lock_irqsave(&hw->alloc_lock, flags);
		ilo_ccb_open(hw, data, slot);
		hw->ccb_alloc[slot] = data;
		spin_unlock_irqrestore(&hw->alloc_lock, flags);

		/*                                     */
		error = ilo_ccb_verify(hw, data);
		if (error) {

			spin_lock_irqsave(&hw->alloc_lock, flags);
			hw->ccb_alloc[slot] = NULL;
			spin_unlock_irqrestore(&hw->alloc_lock, flags);

			ilo_ccb_close(hw->ilo_dev, data);

			kfree(data);
			goto out;
		}

	} else {
		kfree(data);
		if (fp->f_flags & O_EXCL || hw->ccb_alloc[slot]->ccb_excl) {
			/*
                                              
                                              
                       
    */
			error = -EBUSY;
		} else {
			hw->ccb_alloc[slot]->ccb_cnt++;
			error = 0;
		}
	}
out:
	spin_unlock(&hw->open_lock);

	if (!error)
		fp->private_data = hw->ccb_alloc[slot];

	return error;
}