Index: uspace/lib/c/generic/udebug.c
===================================================================
--- uspace/lib/c/generic/udebug.c	(revision ccbd2e1e0054355c5bc7637afb0c9cf3c9089c3c)
+++ uspace/lib/c/generic/udebug.c	(revision f5a7773d5901d6c1a9f44513cab36e8cd4c71a6c)
@@ -42,5 +42,8 @@
 {
 	async_exch_t *exch = async_exchange_begin(sess);
-	return async_req_1_0(exch, IPC_M_DEBUG, UDEBUG_M_BEGIN);
+	errno_t rc = async_req_1_0(exch, IPC_M_DEBUG, UDEBUG_M_BEGIN);
+	async_exchange_end(exch);
+
+	return rc;
 }
 
@@ -48,5 +51,8 @@
 {
 	async_exch_t *exch = async_exchange_begin(sess);
-	return async_req_1_0(exch, IPC_M_DEBUG, UDEBUG_M_END);
+	errno_t rc = async_req_1_0(exch, IPC_M_DEBUG, UDEBUG_M_END);
+	async_exchange_end(exch);
+
+	return rc;
 }
 
@@ -54,5 +60,8 @@
 {
 	async_exch_t *exch = async_exchange_begin(sess);
-	return async_req_2_0(exch, IPC_M_DEBUG, UDEBUG_M_SET_EVMASK, mask);
+	errno_t rc = async_req_2_0(exch, IPC_M_DEBUG, UDEBUG_M_SET_EVMASK, mask);
+	async_exchange_end(exch);
+
+	return rc;
 }
 
@@ -65,4 +74,5 @@
 	errno_t rc = async_req_3_3(exch, IPC_M_DEBUG, UDEBUG_M_THREAD_READ,
 	    (sysarg_t) buffer, n, NULL, &a_copied, &a_needed);
+	async_exchange_end(exch);
 
 	*copied = (size_t) a_copied;
@@ -80,4 +90,5 @@
 	errno_t rc = async_req_3_3(exch, IPC_M_DEBUG, UDEBUG_M_NAME_READ,
 	    (sysarg_t) buffer, n, NULL, &a_copied, &a_needed);
+	async_exchange_end(exch);
 
 	*copied = (size_t) a_copied;
@@ -95,4 +106,5 @@
 	errno_t rc = async_req_3_3(exch, IPC_M_DEBUG, UDEBUG_M_AREAS_READ,
 	    (sysarg_t) buffer, n, NULL, &a_copied, &a_needed);
+	async_exchange_end(exch);
 
 	*copied = (size_t) a_copied;
@@ -105,6 +117,9 @@
 {
 	async_exch_t *exch = async_exchange_begin(sess);
-	return async_req_4_0(exch, IPC_M_DEBUG, UDEBUG_M_MEM_READ,
+	errno_t rc = async_req_4_0(exch, IPC_M_DEBUG, UDEBUG_M_MEM_READ,
 	    (sysarg_t) buffer, addr, n);
+	async_exchange_end(exch);
+
+	return rc;
 }
 
@@ -112,6 +127,9 @@
 {
 	async_exch_t *exch = async_exchange_begin(sess);
-	return async_req_3_0(exch, IPC_M_DEBUG, UDEBUG_M_ARGS_READ,
+	errno_t rc = async_req_3_0(exch, IPC_M_DEBUG, UDEBUG_M_ARGS_READ,
 	    tid, (sysarg_t) buffer);
+	async_exchange_end(exch);
+
+	return rc;
 }
 
@@ -119,6 +137,9 @@
 {
 	async_exch_t *exch = async_exchange_begin(sess);
-	return async_req_3_0(exch, IPC_M_DEBUG, UDEBUG_M_REGS_READ,
+	errno_t rc = async_req_3_0(exch, IPC_M_DEBUG, UDEBUG_M_REGS_READ,
 	    tid, (sysarg_t) buffer);
+	async_exchange_end(exch);
+
+	return rc;
 }
 
@@ -131,4 +152,5 @@
 	errno_t rc = async_req_2_3(exch, IPC_M_DEBUG, UDEBUG_M_GO,
 	    tid, &a_ev_type, val0, val1);
+	async_exchange_end(exch);
 
 	*ev_type = a_ev_type;
@@ -139,5 +161,8 @@
 {
 	async_exch_t *exch = async_exchange_begin(sess);
-	return async_req_2_0(exch, IPC_M_DEBUG, UDEBUG_M_STOP, tid);
+	errno_t rc = async_req_2_0(exch, IPC_M_DEBUG, UDEBUG_M_STOP, tid);
+	async_exchange_end(exch);
+
+	return rc;
 }