C++ (Cpp) acm_wb_alloc Exemples

Exemple #1

static int acm_tty_write(struct tty_struct *tty,
					const unsigned char *buf, int count)
{
	struct acm *acm = tty->driver_data;
	int stat;
	unsigned long flags;
	int wbn;
	struct acm_wb *wb;

	if (!ACM_READY(acm))
		return -EINVAL;
	if (!count)
		return 0;

	dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);

	spin_lock_irqsave(&acm->write_lock, flags);
	wbn = acm_wb_alloc(acm);
	if (wbn < 0) {
		spin_unlock_irqrestore(&acm->write_lock, flags);
		return 0;
	}
	wb = &acm->wb[wbn];

	count = (count > acm->writesize) ? acm->writesize : count;
	dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
	memcpy(wb->buf, buf, count);
	wb->len = count;
	spin_unlock_irqrestore(&acm->write_lock, flags);

	stat = acm_write_start(acm, wbn);
	if (stat < 0)
		return stat;
	return count;
}

Exemple #2

Fichier : cdc-acm.c Projet : IgnasD/Tomato-RAF

static int acm_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
	struct acm *acm = tty->driver_data;
	int stat;
	unsigned long flags;
	int wbn;
	struct acm_wb *wb;

	dbg("Entering acm_tty_write to write %d bytes,", count);

	if (!ACM_READY(acm))
		return -EINVAL;
	if (!count)
		return 0;

	spin_lock_irqsave(&acm->write_lock, flags);
	if ((wbn = acm_wb_alloc(acm)) < 0) {
		spin_unlock_irqrestore(&acm->write_lock, flags);
		return 0;
	}
	wb = &acm->wb[wbn];

	count = (count > acm->writesize) ? acm->writesize : count;
	dbg("Get %d bytes...", count);
	memcpy(wb->buf, buf, count);
	wb->len = count;
	spin_unlock_irqrestore(&acm->write_lock, flags);

	if ((stat = acm_write_start(acm, wbn)) < 0)
		return stat;
	return count;
}

Exemple #3

Fichier : cdc-acm.c Projet : gmanika/launchpad-linux-driver

static int acm_tty_write(struct tty_struct *tty,
					const unsigned char *buf, int count)
{
	struct acm *acm = tty->driver_data;
	int stat;
	unsigned long flags;
	int wbn;
	struct acm_wb *wb;

	if (!count)
		return 0;

	dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);

	spin_lock_irqsave(&acm->write_lock, flags);
	wbn = acm_wb_alloc(acm);
	if (wbn < 0) {
		spin_unlock_irqrestore(&acm->write_lock, flags);
		return 0;
	}
	wb = &acm->wb[wbn];

	if (!acm->dev) {
		wb->use = 0;
		spin_unlock_irqrestore(&acm->write_lock, flags);
		return -ENODEV;
	}

	count = (count > acm->writesize) ? acm->writesize : count;
	dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
	memcpy(wb->buf, buf, count);
	wb->len = count;

	usb_autopm_get_interface_async(acm->control);
	if (acm->susp_count) {
		if (!acm->delayed_wb)
			acm->delayed_wb = wb;
		else
			usb_autopm_put_interface_async(acm->control);
		spin_unlock_irqrestore(&acm->write_lock, flags);
		return count;	/* A white lie */
	}
	usb_mark_last_busy(acm->dev);

	stat = acm_start_wb(acm, wb);
	spin_unlock_irqrestore(&acm->write_lock, flags);

	if (stat < 0)
		return stat;
	return count;
}