linux-kernel - [PATCH v3 1/1] PCI: of: Relax max-link-speed check to support PCIe Gen5/Gen6

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20251101164132.14145-1-18255117159@163.com>
Date: Sun,  2 Nov 2025 00:41:32 +0800
From: Hans Zhang <18255117159@....com>
To: bhelgaas@...gle.com,
	helgaas@...nel.org
Cc: linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Hans Zhang <18255117159@....com>,
	Manivannan Sadhasivam <mani@...nel.org>
Subject: [PATCH v3 1/1] PCI: of: Relax max-link-speed check to support PCIe Gen5/Gen6

The existing code restricted `max-link-speed` to values 1~4 (Gen1~Gen4),
but current SOCs using Synopsys/Cadence IP may require Gen5/Gen6 support.

While DT binding validation already checks this property, the code-level
validation in `of_pci_get_max_link_speed` also needs to be updated to allow
values up to 6, ensuring compatibility with newer PCIe generations.

Signed-off-by: Hans Zhang <18255117159@....com>
Reviewed-by: Manivannan Sadhasivam <mani@...nel.org>
---
Changes for v3:
- Modify the commit message.
- Add Reviewed-by tag.

Changes for v2:
https://patchwork.kernel.org/project/linux-pci/cover/20250529021026.475861-1-18255117159@163.com/
- The following files have been deleted:
  Documentation/devicetree/bindings/pci/pci.txt

  Update to this file again:
  dtschema/schemas/pci/pci-bus-common.yaml
---
 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..53928e4b3780 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -890,7 +890,7 @@ int of_pci_get_max_link_speed(struct device_node *node)
 	u32 max_link_speed;
 
 	if (of_property_read_u32(node, "max-link-speed", &max_link_speed) ||
-	    max_link_speed == 0 || max_link_speed > 4)
+	    max_link_speed == 0 || max_link_speed > 6)
 		return -EINVAL;
 
 	return max_link_speed;
-- 
2.34.1