From: Fei Yang <fei.yang@intel.com>
Date: Wed, 20 Apr 2016 06:08:43 +0000 (+0300)
Subject: usb: dwc3: ep0: sanity check test mode selector
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ae411413760785a0a2ce6cb44d5afe95115aa24d;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

usb: dwc3: ep0: sanity check test mode selector

In case host sends us an unsupported test mode, we
*must* stall this request. This will tell the host
that the selector is invalid and we won't put the
controller in unsupported test modes which could
have undetermined side-effects.

Signed-off-by: Fei Yang <fei.yang@intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
---

diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 143deb420481..51b52a79dfec 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -463,8 +463,18 @@ static int dwc3_ep0_handle_feature(struct dwc3 *dwc,
 			if (!set)
 				return -EINVAL;
 
-			dwc->test_mode_nr = wIndex >> 8;
-			dwc->test_mode = true;
+			switch (wIndex >> 8) {
+			case TEST_J:
+			case TEST_K:
+			case TEST_SE0_NAK:
+			case TEST_PACKET:
+			case TEST_FORCE_EN:
+				dwc->test_mode_nr = wIndex >> 8;
+				dwc->test_mode = true;
+				break;
+			default:
+				return -EINVAL;
+			}
 			break;
 		default:
 			return -EINVAL;