diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 86b69f85f90..9d932f4e4f9 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -612,7 +612,7 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
 	if (children_add_size > add_size)
 		add_size = children_add_size;
 	size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 :
-		calculate_iosize(size, min_size+add_size, size1,
+		calculate_iosize(size, min_size, add_size + size1,
 			resource_size(b_res), 4096);
 	if (!size0 && !size1) {
 		if (b_res->start || b_res->end)
@@ -726,7 +726,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
 	if (children_add_size > add_size)
 		add_size = children_add_size;
 	size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 :
-		calculate_memsize(size, min_size+add_size, 0,
+		calculate_memsize(size, min_size, add_size,
 				resource_size(b_res), min_align);
 	if (!size0 && !size1) {
 		if (b_res->start || b_res->end)
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 6923a9bce49..241de6c2b9c 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -255,11 +255,12 @@ int pci_reassign_resource(struct pci_dev *dev, int resno, resource_size_t addsiz
 		return -EINVAL;
 	}
 
-	new_size = resource_size(res) + addsize + min_align;
+	/* already aligned with min_align */
+	new_size = resource_size(res) + addsize;
 	ret = _pci_assign_resource(dev, resno, new_size, min_align);
 	if (!ret) {
 		res->flags &= ~IORESOURCE_STARTALIGN;
-		dev_info(&dev->dev, "BAR %d: assigned %pR\n", resno, res);
+		dev_info(&dev->dev, "BAR %d: reassigned %pR\n", resno, res);
 		if (resno < PCI_BRIDGE_RESOURCES)
 			pci_update_resource(dev, resno);
 	}