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usb: dwc3: Reset num_trbs after skipping 

Currently req->num_trbs is not reset after the TRBs are skipped and
processed from the cancelled list. The gadget driver may reuse the
request with an invalid req->num_trbs, and DWC3 will incorrectly skip
trbs. To fix this, simply reset req->num_trbs to 0 after skipping
through all of them.

Fixes: c3acd59014 ("usb: dwc3: gadget: use num_trbs when skipping TRBs on ->dequeue()")
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Thinh Nguyen 2019-02-12 19:39:27 -08:00 committed by Felipe Balbi
parent c5353b225d
commit c7152763f0
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/dwc3/gadget.c
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@ -1503,6 +1503,8 @@ static void dwc3_gadget_ep_skip_trbs(struct dwc3_ep *dep, struct dwc3_request *r
trb->ctrl &= ~DWC3_TRB_CTRL_HWO; trb->ctrl &= ~DWC3_TRB_CTRL_HWO;
dwc3_ep_inc_deq(dep); dwc3_ep_inc_deq(dep);
} }
req->num_trbs = 0;
} }
static void dwc3_gadget_ep_cleanup_cancelled_requests(struct dwc3_ep *dep) static void dwc3_gadget_ep_cleanup_cancelled_requests(struct dwc3_ep *dep)