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usb: dwc2: gadget: Fix issue in dwc2_gadget_start_isoc()

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[ 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>
This commit is contained in:
Minas Harutyunyan 2018-06-12 12:37:29 +04:00 committed by Greg Kroah-Hartman
parent 3572fd055e
commit 7b2dc4515f
1 changed files with 1 additions and 0 deletions
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1
drivers/usb/dwc2/gadget.c
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@ -932,6 +932,7 @@ static void dwc2_gadget_start_isoc_ddma(struct dwc2_hsotg_ep *hs_ep)
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;
}