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From:   Ran Wang <ran.wang_1@nxp.com>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Kai-Heng Feng <kai.heng.feng@canonical.com>,
        Mathias Nyman <mathias.nyman@linux.intel.com>,
        Alan Stern <stern@rowland.harvard.edu>,
        Mathias Payer <mathias.payer@nebelwelt.net>,
        Dennis Wassenberg <dennis.wassenberg@secunet.com>
Cc:     linux-usb@vger.kernel.org (open list:USB SUBSYSTEM),
        linux-kernel@vger.kernel.org (open list),
        Ran Wang <ran.wang_1@nxp.com>
Subject: [PATCH] usb: hub add filter for device with specific VID&PID
Date:   Mon, 23 Sep 2019 18:51:02 +0800
Message-Id: <20190923105102.37413-1-ran.wang_1@nxp.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

USB 2.0 Embedded Host PET Automated Test (CH6) 6.7.23 A-UUT "Unsupported
Device" Message require to stop enumerating device with VID=0x1a0a PID=0x0201
and pop message to declare this device is not supported.

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
---
 drivers/usb/core/hub.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index bbcfa63..3cda0da 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -4982,6 +4982,18 @@ static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus,
 		if (status < 0)
 			goto loop;
 
+		 /* USB 2.0 Embedded Host PET Automated Test (CH6)
+		 * 6.7.23 A-UUT "Unsupported Device" Message
+		 * require to filter out below device when enumeration
+		 */
+		if ((udev->descriptor.idVendor == 0x1a0a)
+		 && (udev->descriptor.idProduct == 0x0201)) {
+			dev_err(&udev->dev, "This device is not supported: idVendor=0x%x idProduct=0x%x\n",
+				udev->descriptor.idVendor,
+				udev->descriptor.idProduct);
+			goto done;
+		}
+
 		if (udev->quirks & USB_QUIRK_DELAY_INIT)
 			msleep(2000);
 
-- 
2.7.4