Bluetooth: Fix issue with USB suspend in btusb driver

commit 85560c4a828ec9c8573840c9b66487b6ae584768 upstream.

Suspend could fail for some platforms because
btusb_suspend==> btusb_stop_traffic ==> usb_kill_anchored_urbs.

When btusb_bulk_complete returns before system suspend and resubmits
an URB, the system cannot enter suspend state.

Signed-off-by: Champion Chen <champion_chen@realsil.com.cn>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 45aa8e7601247f2b2b7ff8fe29dbeae1cc0bc632..61a8ec4e5f4d7045bd280a86b2989fc0db9b11bc 100644 (file)
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -302,6 +302,9 @@ static void btusb_intr_complete(struct urb *urb)
                        BT_ERR("%s corrupted event packet", hdev->name);
                        hdev->stat.err_rx++;
                }
+       } else if (urb->status == -ENOENT) {
+               /* Avoid suspend failed when usb_kill_urb */
+               return;
        }
 
        if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
@@ -390,6 +393,9 @@ static void btusb_bulk_complete(struct urb *urb)
                        BT_ERR("%s corrupted ACL packet", hdev->name);
                        hdev->stat.err_rx++;
                }
+       } else if (urb->status == -ENOENT) {
+               /* Avoid suspend failed when usb_kill_urb */
+               return;
        }
 
        if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
@@ -484,6 +490,9 @@ static void btusb_isoc_complete(struct urb *urb)
                                hdev->stat.err_rx++;
                        }
                }
+       } else if (urb->status == -ENOENT) {
+               /* Avoid suspend failed when usb_kill_urb */
+               return;
        }
 
        if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))