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usb: dwc3: gadget: only interrupt on short if short_not_ok is set

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We don't need to know about short packets unless
gadget driver told us it's not ok to see them on the
bus. In the normal situation we can continue
processing the list of requests if we get a Short
packet.

Also, note that we're making sure ISP is only set
for OUT endpoints, where that setting is valid.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2016-10-05 14:26:23 +03:00
parent 58f29034b4
commit c9508c8c50
1 changed files with 6 additions and 2 deletions
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8
drivers/usb/dwc3/gadget.c
View file

@ -875,12 +875,16 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
}
/* always enable Continue on Short Packet */
if (usb_endpoint_dir_out(dep->endpoint.desc))
if (usb_endpoint_dir_out(dep->endpoint.desc)) {
trb->ctrl |= DWC3_TRB_CTRL_CSP;
if (req->request.short_not_ok)
trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;
}
if ((!req->request.no_interrupt && !chain) ||
(dwc3_calc_trbs_left(dep) == 0))
trb->ctrl |= DWC3_TRB_CTRL_IOC | DWC3_TRB_CTRL_ISP_IMI;
trb->ctrl |= DWC3_TRB_CTRL_IOC;
if (chain)
trb->ctrl |= DWC3_TRB_CTRL_CHN;