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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Shuah Khan <shuahkh@osg.samsung.com>
Subject: [PATCH 4.9 79/86] usbip: list: dont list devices attached to vhci_hcd
Date:   Fri,  2 Feb 2018 17:58:39 +0100
Message-Id: <20180202140829.942628549@linuxfoundation.org>
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4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Shuah Khan <shuahkh@osg.samsung.com>

commit ef824501f50846589f02173d73ce3fe6021a9d2a upstream.

usbip host lists devices attached to vhci_hcd on the same server
when user does attach over localhost or specifies the server as the
remote.

usbip attach -r localhost -b busid
or
usbip attach -r servername (or server IP)

Fix it to check and not list devices that are attached to vhci_hcd.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 tools/usb/usbip/src/usbip_list.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/tools/usb/usbip/src/usbip_list.c
+++ b/tools/usb/usbip/src/usbip_list.c
@@ -187,6 +187,7 @@ static int list_devices(bool parsable)
 	const char *busid;
 	char product_name[128];
 	int ret = -1;
+	const char *devpath;
 
 	/* Create libudev context. */
 	udev = udev_new();
@@ -209,6 +210,14 @@ static int list_devices(bool parsable)
 		path = udev_list_entry_get_name(dev_list_entry);
 		dev = udev_device_new_from_syspath(udev, path);
 
+		/* Ignore devices attached to vhci_hcd */
+		devpath = udev_device_get_devpath(dev);
+		if (strstr(devpath, USBIP_VHCI_DRV_NAME)) {
+			dbg("Skip the device %s already attached to %s\n",
+			    devpath, USBIP_VHCI_DRV_NAME);
+			continue;
+		}
+
 		/* Get device information. */
 		idVendor = udev_device_get_sysattr_value(dev, "idVendor");
 		idProduct = udev_device_get_sysattr_value(dev, "idProduct");