C++ (Cpp) try_free_mem Examples

Example #1

File: mdc800.c Project: NieHao/Tomato-RAF

int __init usb_mdc800_init (void)
{
	/* Allocate Memory */
	try (mdc800=kmalloc (sizeof (struct mdc800_data), GFP_KERNEL));

	memset(mdc800, 0, sizeof(struct mdc800_data));
	mdc800->dev=0;
	mdc800->open=0;
	mdc800->state=NOT_CONNECTED;
	init_MUTEX (&mdc800->io_lock);

	init_waitqueue_head (&mdc800->irq_wait);
	init_waitqueue_head (&mdc800->write_wait);
	init_waitqueue_head (&mdc800->download_wait);

	mdc800->irq_woken = 0;
	mdc800->downloaded = 0;
	mdc800->written = 0;

	try (mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL));
	try (mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL));
	try (mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL));

	try (mdc800->irq_urb=usb_alloc_urb (0));
	try (mdc800->download_urb=usb_alloc_urb (0));
	try (mdc800->write_urb=usb_alloc_urb (0));

	/* Register the driver */
	if (usb_register (&mdc800_usb_driver) < 0)
		goto cleanup_on_fail;

	info (DRIVER_VERSION ":" DRIVER_DESC);

	return 0;

	/* Clean driver up, when something fails */

cleanup_on_fail:

	if (mdc800 != 0)
	{
		err ("can't alloc memory!");

		try_free_mem (mdc800->download_urb_buffer);
		try_free_mem (mdc800->write_urb_buffer);
		try_free_mem (mdc800->irq_urb_buffer);

		try_free_urb (mdc800->write_urb);
		try_free_urb (mdc800->download_urb);
		try_free_urb (mdc800->irq_urb);

		kfree (mdc800);
	}
	mdc800=0;
	return -1;
}


void __exit usb_mdc800_cleanup (void)
{
	usb_deregister (&mdc800_usb_driver);

	usb_free_urb (mdc800->irq_urb);
	usb_free_urb (mdc800->download_urb);
	usb_free_urb (mdc800->write_urb);

	kfree (mdc800->irq_urb_buffer);
	kfree (mdc800->write_urb_buffer);
	kfree (mdc800->download_urb_buffer);

	kfree (mdc800);
	mdc800=0;
}

module_init (usb_mdc800_init);
module_exit (usb_mdc800_cleanup);

MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_LICENSE("GPL");

Example #2

File: mdc800.c Project: davidbau/davej

int __init usb_mdc800_init (void)
{
	/* Allocate Memory */
	try (mdc800=kmalloc (sizeof (struct mdc800_data), GFP_KERNEL));

	memset(mdc800, 0, sizeof(struct mdc800_data));
	mdc800->dev=0;
	mdc800->open=0;
	mdc800->state=NOT_CONNECTED;
	spin_lock_init (&mdc800->io_lock);

	init_waitqueue_head (&mdc800->irq_wait);
	init_waitqueue_head (&mdc800->write_wait);
	init_waitqueue_head (&mdc800->download_wait);

	try (mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL));
	try (mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL));
	try (mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL));

	try (mdc800->irq_urb=usb_alloc_urb (0));
	try (mdc800->download_urb=usb_alloc_urb (0));
	try (mdc800->write_urb=usb_alloc_urb (0));

	/* Register the driver */
	if (usb_register (&mdc800_usb_driver) < 0)
		goto cleanup_on_fail;

	info ("Mustek Digital Camera Driver " VERSION " (MDC800)");
	info (RELEASE_DATE " Henning Zabel <*****@*****.**>");

	return 0;

	/* Clean driver up, when something fails */

cleanup_on_fail:

	if (mdc800 != 0)
	{
		err ("can't alloc memory!");

		try_free_mem (mdc800->download_urb_buffer);
		try_free_mem (mdc800->write_urb_buffer);
		try_free_mem (mdc800->irq_urb_buffer);

		try_free_urb (mdc800->write_urb);
		try_free_urb (mdc800->download_urb);
		try_free_urb (mdc800->irq_urb);

		kfree (mdc800);
	}
	mdc800=0;
	return -1;
}


void __exit usb_mdc800_cleanup (void)
{
	usb_deregister (&mdc800_usb_driver);

	usb_free_urb (mdc800->irq_urb);
	usb_free_urb (mdc800->download_urb);
	usb_free_urb (mdc800->write_urb);

	kfree (mdc800->irq_urb_buffer);
	kfree (mdc800->write_urb_buffer);
	kfree (mdc800->download_urb_buffer);

	kfree (mdc800);
	mdc800=0;
}


MODULE_AUTHOR ("Henning Zabel <*****@*****.**>");
MODULE_DESCRIPTION ("USB Driver for Mustek MDC800 Digital Camera");

module_init (usb_mdc800_init);
module_exit (usb_mdc800_cleanup);