Commit d9193efb authored Nov 09, 2018 by Sandeep Singh Committed by Greg Kroah-Hartman Nov 09, 2018

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



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] ade2e3a1 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>

parent 1245374e

drivers/usb/host/xhci-ring.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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",

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