linux-kernel - [PATCH 4.19 010/110] xhci: Add check for invalid byte size error when UAS devices are connected.

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Date:   Thu, 29 Nov 2018 15:11:41 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sandeep Singh <sandeep.singh@....com>,
        Nehal Shah <Nehal-bakulchandra.Shah@....com>,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>,
        Mathias Nyman <mathias.nyman@...ux.intel.com>
Subject: [PATCH 4.19 010/110] xhci: Add check for invalid byte size error when UAS devices are connected.

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sandeep Singh <sandeep.singh@....com>

commit d9193efba84fe4c4aa22a569fade5e6ca971f8af upstream.

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

Cc: <stable@...r.kernel.org>
Signed-off-by: Sandeep Singh <sandeep.singh@....com>
cc: Nehal Shah <Nehal-bakulchandra.Shah@....com>
cc: Shyam Sundar S K <Shyam-sundar.S-k@....com>
Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/host/xhci-ring.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2254,6 +2254,7 @@ static int handle_tx_event(struct xhci_h
 			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",