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

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@vger.kernel.org>
Signed-off-by: Sandeep Singh <sandeep.singh@amd.com>
cc: Nehal Shah <Nehal-bakulchandra.Shah@amd.com>
cc: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 6996235..2d64cb0 100644 (file)
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2335,6 +2335,7 @@ 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",