phy: stm32: fix an error code in probe

[ Upstream commit ca1c73628f5bd0c1ef6e46073cc3be2450605b06 ]

If "index > usbphyc->nphys" is true then this returns success but it
should return -EINVAL.

Fixes: 94c358da3a05 ("phy: stm32: add support for STM32 USB PHY Controller (USBPHYC)")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/Y0kq8j6S+5nDdMpr@kili
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/phy/st/phy-stm32-usbphyc.c b/drivers/phy/st/phy-stm32-usbphyc.c
index cd0747a..27f7e22 100644 (file)
--- a/drivers/phy/st/phy-stm32-usbphyc.c
+++ b/drivers/phy/st/phy-stm32-usbphyc.c
@@ -532,6 +532,8 @@ static int stm32_usbphyc_probe(struct platform_device *pdev)
                ret = of_property_read_u32(child, "reg", &index);
                if (ret || index > usbphyc->nphys) {
                        dev_err(&phy->dev, "invalid reg property: %d\n", ret);
+                       if (!ret)
+                               ret = -EINVAL;
                        goto put_child;
                }