usb: phy: mxs: suspend to RAM causes NULL pointer dereference

[firefly-linux-kernel-4.4.55.git] / drivers / usb / phy / phy-mxs-usb.c

diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c
index 8f7cb068d29bab1eb1f9641e41cbe4da30e22489..3fcc0483a0811e8f7e2984aea1c4a11ce2da0951 100644 (file)
--- a/drivers/usb/phy/phy-mxs-usb.c
+++ b/drivers/usb/phy/phy-mxs-usb.c
@@ -217,6 +217,9 @@ static bool mxs_phy_get_vbus_status(struct mxs_phy *mxs_phy)
 {
        unsigned int vbus_value;
 
+       if (!mxs_phy->regmap_anatop)
+               return false;
+
        if (mxs_phy->port_id == 0)
                regmap_read(mxs_phy->regmap_anatop,
                        ANADIG_USB1_VBUS_DET_STAT,