From 11274d22839b1e4bf31989682585017ded2ecf03 Mon Sep 17 00:00:00 2001
From: Masaki Muranaka <monaka@monami-ya.com>
Date: Tue, 24 Jun 2014 09:33:05 +0900
Subject: [PATCH] drivers/cmsis_dap_usb: Return with ERROR_FAIL if no CMSIS-DAP
 device is found.

Even if it does not return, the initialization will be failed.
But it is better to show why the error is caused.

Change-Id: I399c7c94a7156be22723a9715e594061bb414a7e
Signed-off-by: Masaki Muranaka <monaka@monami-ya.com>
Reviewed-on: http://openocd.zylin.com/2189
Tested-by: jenkins
Reviewed-by: Andrey Yurovsky <yurovsky@gmail.com>
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
---
 src/jtag/drivers/cmsis_dap_usb.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/jtag/drivers/cmsis_dap_usb.c b/src/jtag/drivers/cmsis_dap_usb.c
index 4073d215a..b8f004c47 100644
--- a/src/jtag/drivers/cmsis_dap_usb.c
+++ b/src/jtag/drivers/cmsis_dap_usb.c
@@ -208,6 +208,11 @@ static int cmsis_dap_usb_open(void)
 
 	hid_free_enumeration(devs);
 
+	if (target_vid == 0 && target_pid == 0) {
+		LOG_ERROR("unable to find CMSIS-DAP device");
+		return ERROR_FAIL;
+	}
+
 	if (hid_init() != 0) {
 		LOG_ERROR("unable to open HIDAPI");
 		return ERROR_FAIL;