[PATCH v9 3/5] PCI: j721e: Validate max-link-speed from DT

[Hans Zhang]

Use the new pcie_get_link_speed() helper to validate the value read from
the "max-link-speed" DT property.  If the value is missing or invalid,
fall back to Gen2 (speed = 2).  This prepares for the removal of the
range check in of_pci_get_max_link_speed().

Signed-off-by: Hans Zhang <18255117159@xxxxxxx>
---
 drivers/pci/controller/cadence/pci-j721e.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c
index 6f2501479c70..bfdfe98d5aba 100644
--- a/drivers/pci/controller/cadence/pci-j721e.c
+++ b/drivers/pci/controller/cadence/pci-j721e.c
@@ -202,7 +202,8 @@ static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie,
 	int ret;
 
 	link_speed = of_pci_get_max_link_speed(np);
-	if (link_speed < 2)
+	if ((link_speed < 2) ||
+	    (pcie_get_link_speed(link_speed) == PCI_SPEED_UNKNOWN))
 		link_speed = 2;
 
 	val = link_speed - 1;
-- 
2.34.1