1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 1460a5df92f7..e28670f9a589 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -434,7 +434,7 @@ void hpet_msi_unmask(struct irq_data *data)
 
         /* unmask it */
         cfg = hpet_readl(HPET_Tn_CFG(hdev->num));
-        cfg |= HPET_TN_FSB;
+        cfg |= HPET_TN_ENABLE | HPET_TN_FSB;
         hpet_writel(cfg, HPET_Tn_CFG(hdev->num));
 }
 
@@ -445,7 +445,7 @@ void hpet_msi_mask(struct irq_data *data)
 
         /* mask it */
         cfg = hpet_readl(HPET_Tn_CFG(hdev->num));
-        cfg &= ~HPET_TN_FSB;
+        cfg &= ~(HPET_TN_ENABLE | HPET_TN_FSB);
         hpet_writel(cfg, HPET_Tn_CFG(hdev->num));
 }