scsi: ufs: disable interrupt during clock-gating

Similar to suspend, ufshcd interrupt can be disabled since there won't be
any host controller transaction expected till clocks ungated.

Link: https://lore.kernel.org/r/1575721321-8071-3-git-send-email-stanley.chu@mediatek.comReviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufshcd.c

@@ -1466,6 +1466,8 @@ static void ufshcd_ungate_work(struct work_struct *work)
 	spin_unlock_irqrestore(hba->host->host_lock, flags);
 	ufshcd_setup_clocks(hba, true);
 
+	ufshcd_enable_irq(hba);
+
 	/* Exit from hibern8 */
 	if (ufshcd_can_hibern8_during_gating(hba)) {
 		/* Prevent gating in this path */
@@ -1612,6 +1614,8 @@ static void ufshcd_gate_work(struct work_struct *work)
 		ufshcd_set_link_hibern8(hba);
 	}
 
+	ufshcd_disable_irq(hba);
+
 	if (!ufshcd_is_link_active(hba))
 		ufshcd_setup_clocks(hba, false);
 	else