From b9085389982300529b43ce8abba505ed6ba833c6 Mon Sep 17 00:00:00 2001
From: Spencer Oliver <spen@spen-soft.co.uk>
Date: Tue, 22 May 2012 12:33:40 +0100
Subject: [PATCH] stlink: check read_reg result

Change-Id: I284824aa6f5eae8f6e910a482e9f7435e649fc0d
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/657
Reviewed-by: Peter Stuge <peter@stuge.se>
Tested-by: jenkins
---
 src/target/stm32_stlink.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/target/stm32_stlink.c b/src/target/stm32_stlink.c
index 9afaae0b..b6d4ffa2 100644
--- a/src/target/stm32_stlink.c
+++ b/src/target/stm32_stlink.c
@@ -111,6 +111,8 @@ static int stm32_stlink_load_core_reg_u32(struct target *target,
 		 * it was removed from r1 docs, but still works.
 		 */
 		retval = stlink_if->layout->api->read_reg(stlink_if->fd, 20, value);
+		if (retval != ERROR_OK)
+			return retval;
 
 		switch (num) {
 		case ARMV7M_PRIMASK:
-- 
2.39.5