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usb: dwc3: gadget: CSP is only valid for OUT endpoints

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CSP bit is only valid for OUT endpoints. Synopsys
databook is unclear if HW ignores CSP for IN
endpoints (chances are, it does) but to avoid
problems, let's make sure to set CSP only when valid
to do so.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2016-10-06 17:10:39 +03:00
parent b9bd138e06
commit 58f29034b4
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/dwc3/gadget.c
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@ -875,7 +875,8 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
}
/* always enable Continue on Short Packet */
trb->ctrl |= DWC3_TRB_CTRL_CSP;
if (usb_endpoint_dir_out(dep->endpoint.desc))
trb->ctrl |= DWC3_TRB_CTRL_CSP;
if ((!req->request.no_interrupt && !chain) ||
(dwc3_calc_trbs_left(dep) == 0))