usb/early: remove set but not used variable 'remain_length'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/usb/early/xhci-dbc.c: In function 'xdbc_handle_tx_event':
drivers/usb/early/xhci-dbc.c:720:9: warning:
 variable 'remain_length' set but not used [-Wunused-but-set-variable]

It never be used since introduction in
commit aeb9dd1de98c ("usb/early: Add driver for xhci debug capability")

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c
index e15e896f356c2be311a1aac99eeb0bdc10a1cad9..165653a5e45d643bc057b867cc4856d89053f243 100644 (file)
--- a/drivers/usb/early/xhci-dbc.c
+++ b/drivers/usb/early/xhci-dbc.c
@@ -717,17 +717,14 @@ static void xdbc_handle_port_status(struct xdbc_trb *evt_trb)
 
 static void xdbc_handle_tx_event(struct xdbc_trb *evt_trb)
 {
-       size_t remain_length;
        u32 comp_code;
        int ep_id;
 
        comp_code       = GET_COMP_CODE(le32_to_cpu(evt_trb->field[2]));
-       remain_length   = EVENT_TRB_LEN(le32_to_cpu(evt_trb->field[2]));
        ep_id           = TRB_TO_EP_ID(le32_to_cpu(evt_trb->field[3]));
 
        switch (comp_code) {
        case COMP_SUCCESS:
-               remain_length = 0;
        case COMP_SHORT_PACKET:
                break;
        case COMP_TRB_ERROR: