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Commit 877de4b4 authored by Arthur Benilov's avatar Arthur Benilov Committed by Greg Kroah-Hartman
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Staging: vme: llseek support in user driver 



Provide vme_user_llseek() implementation.

Signed-off-by: default avatarArthur Benilov <arthur.benilov@iba-group.com>
Signed-off-by: default avatarVincent Bossier <vincent.bossier@iba-group.com>
Acked-by: default avatarMartyn Welch <martyn.welch@ge.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent bb9ea89e

drivers/staging/vme/devices/vme_user.c

+33 −2
Original line number Diff line number Diff line
@@ -400,8 +400,39 @@ static ssize_t vme_user_write(struct file *file, const char *buf, size_t count, 


static loff_t vme_user_llseek(struct file *file, loff_t off, int whence)

{

	printk(KERN_ERR "Llseek currently incomplete\n");

	loff_t absolute = -1;

	unsigned int minor = MINOR(file->f_dentry->d_inode->i_rdev);

	size_t image_size;



	down(&image[minor].sem);

	image_size = vme_get_size(image[minor].resource);



	switch (whence) {

	case SEEK_SET:

		absolute = off;

		break;

	case SEEK_CUR:

		absolute = file->f_pos + off;

		break;

	case SEEK_END:

		absolute = image_size + off;

		break;

	default:

		up(&image[minor].sem);

		return -EINVAL;

		break;

	}



	if ((absolute < 0) || (absolute >= image_size)) {

		up(&image[minor].sem);

		return -EINVAL;

	}



	file->f_pos = absolute;



	up(&image[minor].sem);



	return absolute;

}



/*