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usb: dwc3: gadget: interrupt on ring full too

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If the ring is full and we are processing a big
sglist, then let's interrupt so we can, later, add
more TRBs to the ring.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2016-08-12 13:13:10 +03:00
parent 0b3e4af3c7
commit 2c78c0295f
1 changed files with 4 additions and 1 deletions
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5
drivers/usb/dwc3/gadget.c
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@ -758,6 +758,8 @@ static void dwc3_gadget_ep_free_request(struct usb_ep *ep,
kfree(req);
}
static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep);
/**
* dwc3_prepare_one_trb - setup one TRB from one request
* @dep: endpoint for which this request is prepared
@ -818,7 +820,8 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
/* always enable Continue on Short Packet */
trb->ctrl |= DWC3_TRB_CTRL_CSP;
if (!req->request.no_interrupt && !chain)
if ((!req->request.no_interrupt && !chain) ||
(dwc3_calc_trbs_left(dep) == 0))
trb->ctrl |= DWC3_TRB_CTRL_IOC | DWC3_TRB_CTRL_ISP_IMI;
if (chain)