[PATCH 5.4 207/434] phy: renesas: phy-rcar-gen2: Fix the array off by one warning

[Greg Kroah-Hartman]

From: Biju Das <biju.das@xxxxxxxxxxxxxx>

[ Upstream commit c9baab38fe0e28762d0d67611cbe2aef0fb3fc72 ]

Fix the below smatch warning by adding variable check rather than the
hardcoded value.
warn: array off by one? 'data->select_value[channel_num]'

Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Biju Das <biju.das@xxxxxxxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Reviewed-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Ulrich Hecht <uli+renesas@xxxxxxxx>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/phy/renesas/phy-rcar-gen2.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/renesas/phy-rcar-gen2.c b/drivers/phy/renesas/phy-rcar-gen2.c
index 2926e4937301..2e279ac0fa4d 100644
--- a/drivers/phy/renesas/phy-rcar-gen2.c
+++ b/drivers/phy/renesas/phy-rcar-gen2.c
@@ -71,6 +71,7 @@ struct rcar_gen2_phy_driver {
 struct rcar_gen2_phy_data {
 	const struct phy_ops *gen2_phy_ops;
 	const u32 (*select_value)[PHYS_PER_CHANNEL];
+	const u32 num_channels;
 };
 
 static int rcar_gen2_phy_init(struct phy *p)
@@ -271,11 +272,13 @@ static const u32 usb20_select_value[][PHYS_PER_CHANNEL] = {
 static const struct rcar_gen2_phy_data rcar_gen2_usb_phy_data = {
 	.gen2_phy_ops = &rcar_gen2_phy_ops,
 	.select_value = pci_select_value,
+	.num_channels = ARRAY_SIZE(pci_select_value),
 };
 
 static const struct rcar_gen2_phy_data rz_g1c_usb_phy_data = {
 	.gen2_phy_ops = &rz_g1c_phy_ops,
 	.select_value = usb20_select_value,
+	.num_channels = ARRAY_SIZE(usb20_select_value),
 };
 
 static const struct of_device_id rcar_gen2_phy_match_table[] = {
@@ -389,7 +392,7 @@ static int rcar_gen2_phy_probe(struct platform_device *pdev)
 		channel->selected_phy = -1;
 
 		error = of_property_read_u32(np, "reg", &channel_num);
-		if (error || channel_num > 2) {
+		if (error || channel_num >= data->num_channels) {
 			dev_err(dev, "Invalid \"reg\" property\n");
 			of_node_put(np);
 			return error;
-- 
2.20.1