From d9193efba84fe4c4aa22a569fade5e6ca971f8af Mon Sep 17 00:00:00 2001
From: Sandeep Singh <sandeep.singh@amd.com>
Date: Fri, 9 Nov 2018 17:21:19 +0200
Subject: [PATCH] xhci: Add check for invalid byte size error when UAS devices are connected.
Git-commit: d9193efba84fe4c4aa22a569fade5e6ca971f8af
Patch-mainline: v4.20-rc4
References: bsc#1051510
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/usb/host/xhci-ring.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 80d464ea5a9a..730a6ecd85fc 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -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",
--
2.19.1