diff --git a/drivers/media/pci/cx25821/cx25821-core.c b/drivers/media/pci/cx25821/cx25821-core.c
index 6627fa9166d3..a7336be44474 100644
--- a/drivers/media/pci/cx25821/cx25821-core.c
+++ b/drivers/media/pci/cx25821/cx25821-core.c
@@ -908,6 +908,7 @@ static int cx25821_dev_setup(struct cx25821_dev *dev)
 
 	if (!dev->lmmio) {
 		CX25821_ERR("ioremap failed, maybe increasing __VMALLOC_RESERVE in page.h\n");
+		release_mem_region(dev->base_io_addr, pci_resource_len(dev->pci, 0));
 		cx25821_iounmap(dev);
 		return -ENOMEM;
 	}