From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
A TRB which is dequeued seems to have its HWO bits set to 1. Therefore
we ignore it if we dequeue it after the command is completed.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/usb/dwc3/gadget.c | 12 +++++++++---
1 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index cebaef7..56f0e46 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1309,11 +1309,17 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep,
dwc3_trb_to_nat(req->trb, &trb);
- if (trb.hwo) {
+ if (trb.hwo && status != -ESHUTDOWN)
+ /*
+ * We continue despite the error. There is not much we
+ * can do. If we don't clean in up we loop for ever. If
+ * we skip the TRB than it gets overwritten reused after
+ * a while since we use them in a ring buffer. a BUG()
+ * would help. Lets hope that if this occures, someone
+ * fixes the root cause instead of looking away :)
+ */
dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n",
dep->name, req->trb);
- continue;
- }
count = trb.length;
if (dep->direction) {
--
1.7.7
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