From: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Date: Wed, 11 Nov 2009 18:28:40 +0000 (-0800)
Subject: USB: xhci: Return success for vendor-specific info codes.
X-Git-Tag: v2.6.33-rc1~315^2~46
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5ad6a529c28db36010ec56c5ee8120addc712b51;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git

USB: xhci: Return success for vendor-specific info codes.

An xHCI host controller manufacturer can choose to implement several
vendor-specific informational completion codes.  These are all to be
treated like a successful transfer completion.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 98437ff..1549b9c 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1153,6 +1153,16 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 		status = -ENOSR;
 		break;
 	default:
+		if (trb_comp_code >= 224 && trb_comp_code <= 255) {
+			/* Vendor defined "informational" completion code,
+			 * treat as not-an-error.
+			 */
+			xhci_dbg(xhci, "Vendor defined info completion code %u\n",
+					trb_comp_code);
+			xhci_dbg(xhci, "Treating code as success.\n");
+			status = 0;
+			break;
+		}
 		xhci_warn(xhci, "ERROR Unknown event condition, HC probably busted\n");
 		urb = NULL;
 		goto cleanup;