[PATCH v4 03/12] PCI: of: Zero max-link-speed value is invalid

[Pali Rohár]

Interpret zero value of max-link-speed property as invalid,
as the device tree bindings documentation specifies.

Signed-off-by: Pali Rohár <p...@kernel.org>
---
 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 81ceeaa6f1d5..27839cd2459f 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -592,7 +592,7 @@ 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 > 4)
+           max_link_speed == 0 || max_link_speed > 4)
                return -EINVAL;
 
        return max_link_speed;
-- 
2.20.1