staging: vt6656: set usb_set_intfdata on driver fail.

intfdata will contain stale pointer when the device is detached after
failed initialization when referenced in vt6656_disconnect

Provide driver access to it here and NULL it.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Link: https://lore.kernel.org/r/6de448d7-d833-ef2e-dd7b-3ef9992fee0e@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/vt6656/device.h b/drivers/staging/vt6656/device.h
index 6074ced..50e1c89 100644 (file)
--- a/drivers/staging/vt6656/device.h
+++ b/drivers/staging/vt6656/device.h
@@ -259,6 +259,7 @@ struct vnt_private {
        u8 mac_hw;
        /* netdev */
        struct usb_device *usb;
+       struct usb_interface *intf;
 
        u64 tsf_time;
        u8 rx_rate;

diff --git a/drivers/staging/vt6656/main_usb.c b/drivers/staging/vt6656/main_usb.c
index 4a5d741..9cb924c 100644 (file)
--- a/drivers/staging/vt6656/main_usb.c
+++ b/drivers/staging/vt6656/main_usb.c
@@ -992,6 +992,7 @@ vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
        priv = hw->priv;
        priv->hw = hw;
        priv->usb = udev;
+       priv->intf = intf;
 
        vnt_set_options(priv);
 

diff --git a/drivers/staging/vt6656/wcmd.c b/drivers/staging/vt6656/wcmd.c
index 3eb2f11..2c5250c 100644 (file)
--- a/drivers/staging/vt6656/wcmd.c
+++ b/drivers/staging/vt6656/wcmd.c
@@ -99,6 +99,7 @@ void vnt_run_command(struct work_struct *work)
                if (vnt_init(priv)) {
                        /* If fail all ends TODO retry */
                        dev_err(&priv->usb->dev, "failed to start\n");
+                       usb_set_intfdata(priv->intf, NULL);
                        ieee80211_free_hw(priv->hw);
                        return;
                }