r8152: check the status before submitting rx

Don't submit the rx if the device is unplugged, stopped, or
linking down.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index cd93388..b23426e 100644 (file)
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -1789,6 +1789,11 @@ int r8152_submit_rx(struct r8152 *tp, struct rx_agg *agg, gfp_t mem_flags)
 {
        int ret;
 
+       /* The rx would be stopped, so skip submitting */
+       if (test_bit(RTL8152_UNPLUG, &tp->flags) ||
+           !test_bit(WORK_ENABLE, &tp->flags) || !netif_carrier_ok(tp->netdev))
+               return 0;
+
        usb_fill_bulk_urb(agg->urb, tp->udev, usb_rcvbulkpipe(tp->udev, 1),
                          agg->head, agg_buf_sz,
                          (usb_complete_t)read_bulk_callback, agg);