4.17-stable review patch. If anyone has any objections, please let me know.
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From: Minas Harutyunyan Minas.Harutyunyan@synopsys.com
[ Upstream commit 1ffba9058737af2ddeebc813faa8ea9b16bc892a ]
In case of requests queue is empty reset EP target_frame to initial value.
This allow restarting ISOC traffic in case when function driver queued requests with interruptions.
Tested-by: Zeng Tao prime.zeng@hisilicon.com Signed-off-by: Minas Harutyunyan hminas@synopsys.com Signed-off-by: Felipe Balbi felipe.balbi@linux.intel.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/dwc2/gadget.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -892,6 +892,7 @@ static void dwc2_gadget_start_isoc_ddma( u32 ctrl;
if (list_empty(&hs_ep->queue)) { + hs_ep->target_frame = TARGET_FRAME_INITIAL; dev_dbg(hsotg->dev, "%s: No requests in queue\n", __func__); return; }