From 999bc5e660a31a97870e6afb42b0b9cf7f3f780a Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Mon, 12 Jun 2023 00:32:35 +0100 Subject: [PATCH] phy: sun4i-usb: Fix of_xlate() argument check In its of_xlate() function, the Allwinner USB PHY driver compares the args_count variable against the number of implemented USB PHYs, although this is the *number of arguments* to the DT phandle property. Per the DT binding for this PHY device, this number is always one, so this check will always fail if the particular SoC implements exactly one USB PHY. So far this affected only the V3s (which has USB support disabled), but the F1C100s also sports one PHY only. Fix that check to compare args_count against exactly 1, and the args[0] content (requested PHY number) against the number of implemented PHYs. This fixes USB operation on the Allwinner V3s and allows to enable USB on the Allwinner F1C100s SoC. Signed-off-by: Andre Przywara Reviewed-by: Jernej Skrabec --- drivers/phy/allwinner/phy-sun4i-usb.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/phy/allwinner/phy-sun4i-usb.c b/drivers/phy/allwinner/phy-sun4i-usb.c index 6428163..dbea70f 100644 --- a/drivers/phy/allwinner/phy-sun4i-usb.c +++ b/drivers/phy/allwinner/phy-sun4i-usb.c @@ -372,7 +372,10 @@ static int sun4i_usb_phy_xlate(struct phy *phy, { struct sun4i_usb_phy_data *data = dev_get_priv(phy->dev); - if (args->args_count >= data->cfg->num_phys) + if (args->args_count != 1) + return -EINVAL; + + if (args->args[0] >= data->cfg->num_phys) return -EINVAL; if (data->cfg->missing_phys & BIT(args->args[0])) -- 2.7.4