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xhci: Add check for invalid byte size error when UAS devices are connected.

PATCH New Mathias Nyman 1 participant 1 message Nov 12, 2018

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PATCH 3/6 xhci: Add check for invalid byte size error when UAS devices are connected.

From: Sandeep Singh <[email protected]>

Observed "TRB completion code (27)" error which corresponds to Stopped - Length Invalid error(xhci spec section 4.17.4) while connecting USB to SATA bridge.

Looks like this case was not considered when the following patch[1] was committed. Hence adding this new check which can prevent
the invalid byte size error.

[1] ade2e3a xhci: handle transfer events without TRB pointer

---
 drivers/usb/host/xhci-ring.c | 1 +
 1 file changed, 1 insertion(+)
drivers/usb/host/xhci-ring.c +1 -0
index 80d464e..730a6ec 100644
@@ -2273,6 +2273,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 			goto cleanup;
 		case COMP_RING_UNDERRUN:
 		case COMP_RING_OVERRUN:
+		case COMP_STOPPED_LENGTH_INVALID:
 			goto cleanup;
 		default:
 			xhci_err(xhci, "ERROR Transfer event for unknown stream ring slot %u ep %u\n",