From cde7726b8730242cd40a9974d129b46af80c68af Mon Sep 17 00:00:00 2001
From: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>
Date: Sat, 8 Sep 2018 21:44:43 +0200
Subject: [PATCH] cortexm: detach still needs extra cycles.

---
 src/target/cortexm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/target/cortexm.c b/src/target/cortexm.c
index 3010daa..8de881c 100644
--- a/src/target/cortexm.c
+++ b/src/target/cortexm.c
@@ -414,6 +414,8 @@ void cortexm_detach(target *t)
 
 	/* Disable debug */
 	target_mem_write32(t, CORTEXM_DHCSR, CORTEXM_DHCSR_DBGKEY);
+	/* Add some clock cycles to get the CPU running again.*/
+	target_mem_read32(t, 0);
 }
 
 enum { DB_DHCSR, DB_DCRSR, DB_DCRDR, DB_DEMCR };