diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c
index 4a2fc7ab42c3..218c1f5252b6 100644
--- a/drivers/pci/p2pdma.c
+++ b/drivers/pci/p2pdma.c
@@ -152,6 +152,7 @@ static int p2pmem_alloc_mmap(struct file *filp, struct kobject *kobj,
 		ret = vm_insert_page(vma, vaddr, page);
 		if (ret) {
 			gen_pool_free(p2pdma->pool, (uintptr_t)kaddr, len);
+			percpu_ref_put(ref);
 			return ret;
 		}
 		percpu_ref_get(ref);