diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 453d6ba6811e..be91a09c74a5 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2101,6 +2101,7 @@ pci_set_dma_mask(struct pci_dev *dev, u64 mask)
 		return -EIO;
 
 	dev->dma_mask = mask;
+	dev_dbg(&dev->dev, "using %dbit DMA mask\n", fls64(mask));
 
 	return 0;
 }
@@ -2112,6 +2113,7 @@ pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
 		return -EIO;
 
 	dev->dev.coherent_dma_mask = mask;
+	dev_dbg(&dev->dev, "using %dbit consistent DMA mask\n", fls64(mask));
 
 	return 0;
 }