static ssize_t pnpbios_proc_write()

in pnpbios/proc.c [179:211]

• 32 lines of code
• 6 McCabe index (conditional complexity)

static ssize_t pnpbios_proc_write(struct file *file, const char __user *buf,
				  size_t count, loff_t *pos)
{
	void *data = PDE_DATA(file_inode(file));
	struct pnp_bios_node *node;
	int boot = (long)data >> 8;
	u8 nodenum = (long)data;
	int ret = count;

	node = kzalloc(node_info.max_node_size, GFP_KERNEL);
	if (!node)
		return -ENOMEM;
	if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
		ret = -EIO;
		goto out;
	}
	if (count != node->size - sizeof(struct pnp_bios_node)) {
		ret = -EINVAL;
		goto out;
	}
	if (copy_from_user(node->data, buf, count)) {
		ret = -EFAULT;
		goto out;
	}
	if (pnp_bios_set_dev_node(node->handle, boot, node) != 0) {
		ret = -EINVAL;
		goto out;
	}
	ret = count;
out:
	kfree(node);
	return ret;
}