diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index b3bbe4278786..78f27f7b4203 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -13185,15 +13185,16 @@ static void read_mod_write(struct hfi1_devdata *dd, u16 src, u64 bits,
 {
 	u64 reg;
 	u16 idx = src / BITS_PER_REGISTER;
+	unsigned long flags;
 
-	spin_lock(&dd->irq_src_lock);
+	spin_lock_irqsave(&dd->irq_src_lock, flags);
 	reg = read_csr(dd, CCE_INT_MASK + (8 * idx));
 	if (set)
 		reg |= bits;
 	else
 		reg &= ~bits;
 	write_csr(dd, CCE_INT_MASK + (8 * idx), reg);
-	spin_unlock(&dd->irq_src_lock);
+	spin_unlock_irqrestore(&dd->irq_src_lock, flags);
 }
 
 /**