Arm64 kernels are frequently built dual ACPI/DT, and then boot in ACPI
mode. In this case, there won't be an of_root, except for rare DT
described PCIe boards.

As a result, users in the common case see this high priority worrying
message, despite the machine working as expected.

Reduce this message to pr_debug() to avoid unnecessary noise.

Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
---
 drivers/pci/of.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index 3579265f1198..4115017f4139 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -775,7 +775,7 @@ void of_pci_make_host_bridge_node(struct pci_host_bridge *bridge)
 
 	/* Check if there is a DT root node to attach the created node */
 	if (!of_root) {
-		pr_err("of_root node is NULL, cannot create PCI host bridge node\n");
+		pr_debug("of_root node is NULL, cannot create PCI host bridge node\n");
 		return;
 	}
 
-- 
2.53.0

On Sun, Mar 08, 2026 at 11:59:30PM -0500, Jeremy Linton wrote:
> Arm64 kernels are frequently built dual ACPI/DT, and then boot in ACPI
> mode. In this case, there won't be an of_root, except for rare DT
> described PCIe boards.
> 
> As a result, users in the common case see this high priority worrying
> message, despite the machine working as expected.
> 
> Reduce this message to pr_debug() to avoid unnecessary noise.
> 
> Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>

Applied to pci/misc for v7.1, thanks!

> ---
>  drivers/pci/of.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/of.c b/drivers/pci/of.c
> index 3579265f1198..4115017f4139 100644
> --- a/drivers/pci/of.c
> +++ b/drivers/pci/of.c
> @@ -775,7 +775,7 @@ void of_pci_make_host_bridge_node(struct pci_host_bridge *bridge)
>  
>  	/* Check if there is a DT root node to attach the created node */
>  	if (!of_root) {
> -		pr_err("of_root node is NULL, cannot create PCI host bridge node\n");
> +		pr_debug("of_root node is NULL, cannot create PCI host bridge node\n");
>  		return;
>  	}
>  
> -- 
> 2.53.0
>