diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 47f0dcf638f2..fce25a0dcd08 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -74,7 +74,6 @@
 #define ERR_IRQ_ALL			(ERR_AER | ERR_AXI | ERR_CORR | \
 					 ERR_NONFATAL | ERR_FATAL | ERR_SYS)
 
-#define MAX_MSI_HOST_IRQS		8
 /* PCIE controller device IDs */
 #define PCIE_RC_K2HK			0xb008
 #define PCIE_RC_K2E			0xb009
@@ -90,7 +89,7 @@ struct keystone_pcie {
 	int			legacy_host_irqs[PCI_NUM_INTX];
 	struct			device_node *legacy_intc_np;
 
-	int			msi_host_irqs[MAX_MSI_HOST_IRQS];
+	int			msi_host_irq;
 	int			num_lanes;
 	u32			num_viewport;
 	struct phy		**phy;
@@ -553,9 +552,9 @@ static int ks_pcie_establish_link(struct keystone_pcie *ks_pcie)
 
 static void ks_pcie_msi_irq_handler(struct irq_desc *desc)
 {
-	unsigned int irq = irq_desc_get_irq(desc);
+	unsigned int irq = desc->irq_data.hwirq;
 	struct keystone_pcie *ks_pcie = irq_desc_get_handler_data(desc);
-	u32 offset = irq - ks_pcie->msi_host_irqs[0];
+	u32 offset = irq - ks_pcie->msi_host_irq;
 	struct dw_pcie *pci = ks_pcie->pci;
 	struct device *dev = pci->dev;
 	struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -606,6 +605,7 @@ static int ks_pcie_config_msi_irq(struct keystone_pcie *ks_pcie)
 	struct device *dev = ks_pcie->pci->dev;
 	struct device_node *np = ks_pcie->np;
 	struct device_node *intc_np;
+	struct irq_data *irq_data;
 	int irq_count, irq, ret, i;
 
 	if (!IS_ENABLED(CONFIG_PCI_MSI))
@@ -624,19 +624,21 @@ static int ks_pcie_config_msi_irq(struct keystone_pcie *ks_pcie)
 		goto err;
 	}
 
-	if (irq_count > MAX_MSI_HOST_IRQS) {
-		dev_warn(dev, "Too many MSI interrupt lines defined %u\n",
-			 irq_count);
-		irq_count = MAX_MSI_HOST_IRQS;
-	}
-
 	for (i = 0; i < irq_count; i++) {
 		irq = irq_of_parse_and_map(intc_np, i);
 		if (!irq) {
 			ret = -EINVAL;
 			goto err;
 		}
-		ks_pcie->msi_host_irqs[i] = irq;
+
+		if (!ks_pcie->msi_host_irq) {
+			irq_data = irq_get_irq_data(irq);
+			if (!irq_data) {
+				ret = -EINVAL;
+				goto err;
+			}
+			ks_pcie->msi_host_irq = irq_data->hwirq;
+		}
 
 		irq_set_chained_handler_and_data(irq, ks_pcie_msi_irq_handler,
 						 ks_pcie);