static int write_reg()

in hardware/mISDN/hfcsusb.c [76:99]

• 21 lines of code
• 5 McCabe index (conditional complexity)

static int write_reg(struct hfcsusb *hw, __u8 reg, __u8 val)
{
	struct ctrl_buf *buf;

	if (debug & DBG_HFC_CALL_TRACE)
		printk(KERN_DEBUG "%s: %s reg(0x%02x) val(0x%02x)\n",
		       hw->name, __func__, reg, val);

	spin_lock(&hw->ctrl_lock);
	if (hw->ctrl_cnt >= HFC_CTRL_BUFSIZE) {
		spin_unlock(&hw->ctrl_lock);
		return 1;
	}
	buf = &hw->ctrl_buff[hw->ctrl_in_idx];
	buf->hfcs_reg = reg;
	buf->reg_val = val;
	if (++hw->ctrl_in_idx >= HFC_CTRL_BUFSIZE)
		hw->ctrl_in_idx = 0;
	if (++hw->ctrl_cnt == 1)
		ctrl_start_transfer(hw);
	spin_unlock(&hw->ctrl_lock);

	return 0;
}