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Cc:     devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-pci@vger.kernel.org
Subject: [PATCH v4 03/12] PCI: of: Zero max-link-speed value is invalid
Date:   Thu, 30 Apr 2020 10:06:16 +0200
Message-Id: <20200430080625.26070-4-pali@kernel.org>
In-Reply-To: <20200430080625.26070-1-pali@kernel.org>
References: <20200430080625.26070-1-pali@kernel.org>
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Interpret zero value of max-link-speed property as invalid,
as the device tree bindings documentation specifies.

Signed-off-by: Pali Rohár <pali@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