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Date: Tue, 28 Oct 2014 11:36:31 +0800 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Champion Chen <champion_chen@...lsil.com.cn>, Larry Finger <Larry.Finger@...inger.net>, Marcel Holtmann <marcel@...tmann.org> Subject: [PATCH 3.10 33/43] Bluetooth: Fix issue with USB suspend in btusb driver 3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Champion Chen <champion_chen@...lsil.com.cn> 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@...lsil.com.cn> Signed-off-by: Larry Finger <Larry.Finger@...inger.net> Signed-off-by: Marcel Holtmann <marcel@...tmann.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/bluetooth/btusb.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -302,6 +302,9 @@ static void btusb_intr_complete(struct u 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 u 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 u 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)) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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