diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 6142ae8112c3..2cba2a894670 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -342,7 +342,7 @@ static int dw_pcie_msi_host_init(struct dw_pcie_rp *pp)
 
 	if (!pp->num_vectors)
 		pp->num_vectors = MSI_DEF_NUM_VECTORS;
-	num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
+	num_ctrls = DIV_ROUND_UP(pp->num_vectors, MAX_MSI_IRQS_PER_CTRL);
 
 	if (!pp->msi_irq[0]) {
 		pp->msi_irq[0] = platform_get_irq_byname_optional(pdev, "msi");