REG_UTP_TASK_REQ_DOOR_BELL
tm_doorbell = ufshcd_readl(hba, REG_UTP_TASK_REQ_DOOR_BELL);
pending = ufshcd_readl(hba, REG_UTP_TASK_REQ_DOOR_BELL);
REG_UTP_TASK_REQ_DOOR_BELL,
ufshcd_writel(hba, 1 << task_tag, REG_UTP_TASK_REQ_DOOR_BELL);