Index: uspace/drv/audio/hdaudio/hdaudio.c
===================================================================
--- uspace/drv/audio/hdaudio/hdaudio.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/audio/hdaudio/hdaudio.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -175,6 +175,5 @@
 
 	ddf_msg(LVL_NOTE, "create parent sess");
-	hda->parent_sess = ddf_dev_parent_sess_create(dev,
-	    EXCHANGE_SERIALIZE);
+	hda->parent_sess = ddf_dev_parent_sess_create(dev);
 	if (hda->parent_sess == NULL) {
 		ddf_msg(LVL_ERROR, "Failed connecting parent driver.\n");
Index: uspace/drv/audio/sb16/dsp.c
===================================================================
--- uspace/drv/audio/sb16/dsp.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/audio/sb16/dsp.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -159,5 +159,5 @@
 static inline int setup_dma(sb_dsp_t *dsp, uintptr_t pa, size_t size)
 {
-	async_sess_t *sess = devman_parent_device_connect(EXCHANGE_ATOMIC,
+	async_sess_t *sess = devman_parent_device_connect(
 	    ddf_dev_get_handle(dsp->sb_dev), IPC_FLAG_BLOCKING);
 
@@ -307,5 +307,5 @@
 
 	assert(dsp->buffer.data);
-	async_sess_t *sess = devman_parent_device_connect(EXCHANGE_ATOMIC,
+	async_sess_t *sess = devman_parent_device_connect(
 	    ddf_dev_get_handle(dsp->sb_dev), IPC_FLAG_BLOCKING);
 
Index: uspace/drv/audio/sb16/main.c
===================================================================
--- uspace/drv/audio/sb16/main.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/audio/sb16/main.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -178,5 +178,5 @@
 
 	async_sess_t *parent_sess = devman_parent_device_connect(
-	    EXCHANGE_SERIALIZE, ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
+	    ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
 	if (!parent_sess)
 		return ENOMEM;
@@ -245,5 +245,5 @@
 {
 	async_sess_t *parent_sess = devman_parent_device_connect(
-	    EXCHANGE_SERIALIZE, ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
+	    ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
 	if (!parent_sess)
 		return ENOMEM;
Index: uspace/drv/block/ahci/ahci.c
===================================================================
--- uspace/drv/block/ahci/ahci.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/block/ahci/ahci.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -1140,5 +1140,5 @@
 	
 	/* Connect to parent device */
-	ahci->parent_sess = ddf_dev_parent_sess_create(dev, EXCHANGE_SERIALIZE);
+	ahci->parent_sess = ddf_dev_parent_sess_create(dev);
 	if (ahci->parent_sess == NULL)
 		return NULL;
Index: uspace/drv/block/ata_bd/main.c
===================================================================
--- uspace/drv/block/ata_bd/main.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/block/ata_bd/main.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -68,6 +68,5 @@
 	int rc;
 
-	parent_sess = ddf_dev_parent_sess_create(dev,
-	    EXCHANGE_SERIALIZE);
+	parent_sess = ddf_dev_parent_sess_create(dev);
 	if (parent_sess == NULL)
 		return ENOMEM;
Index: uspace/drv/block/ddisk/ddisk.c
===================================================================
--- uspace/drv/block/ddisk/ddisk.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/block/ddisk/ddisk.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -286,5 +286,5 @@
 	int rc;
 
-	parent_sess = ddf_dev_parent_sess_create(dev, EXCHANGE_SERIALIZE);
+	parent_sess = ddf_dev_parent_sess_create(dev);
 	if (parent_sess == NULL)
 		return ENOMEM;
Index: uspace/drv/bus/amba/amba.c
===================================================================
--- uspace/drv/bus/amba/amba.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/bus/amba/amba.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -333,5 +333,5 @@
 	
 	bus->dnode = dnode;
-	async_sess_t *sess = ddf_dev_parent_sess_create(dnode, EXCHANGE_SERIALIZE);
+	async_sess_t *sess = ddf_dev_parent_sess_create(dnode);
 	if (sess == NULL) {
 		ddf_msg(LVL_ERROR, "amba_dev_add failed to connect to the "
Index: uspace/drv/bus/isa/isa.c
===================================================================
--- uspace/drv/bus/isa/isa.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/bus/isa/isa.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -616,5 +616,5 @@
 	list_initialize(&isa->functions);
 
-	sess = ddf_dev_parent_sess_create(dev, EXCHANGE_SERIALIZE);
+	sess = ddf_dev_parent_sess_create(dev);
 	if (sess == NULL) {
 		ddf_msg(LVL_ERROR, "isa_dev_add failed to connect to the "
Index: uspace/drv/bus/pci/pciintel/pci.c
===================================================================
--- uspace/drv/bus/pci/pciintel/pci.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/bus/pci/pciintel/pci.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -664,5 +664,5 @@
 	bus->dnode = dnode;
 	
-	sess = ddf_dev_parent_sess_create(dnode, EXCHANGE_SERIALIZE);
+	sess = ddf_dev_parent_sess_create(dnode);
 	if (sess == NULL) {
 		ddf_msg(LVL_ERROR, "pci_dev_add failed to connect to the "
Index: uspace/drv/bus/usb/ehci/res.c
===================================================================
--- uspace/drv/bus/usb/ehci/res.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/bus/usb/ehci/res.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -81,5 +81,5 @@
 	
 	async_sess_t *parent_sess = devman_parent_device_connect(
-	    EXCHANGE_SERIALIZE, ddf_dev_get_handle(dev), IPC_FLAG_BLOCKING);
+	    ddf_dev_get_handle(dev), IPC_FLAG_BLOCKING);
 	if (!parent_sess)
 		return ENOMEM;
@@ -115,5 +115,5 @@
 {
 	async_sess_t *parent_sess = devman_parent_device_connect(
-	    EXCHANGE_SERIALIZE, ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
+	    ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
 	if (!parent_sess)
 		return ENOMEM;
@@ -138,5 +138,5 @@
 
 	async_sess_t *parent_sess = devman_parent_device_connect(
-	    EXCHANGE_SERIALIZE, ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
+	    ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
 	if (!parent_sess)
 		return ENOMEM;
Index: uspace/drv/bus/usb/ohci/res.c
===================================================================
--- uspace/drv/bus/usb/ohci/res.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/bus/usb/ohci/res.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -57,6 +57,6 @@
 
 	async_sess_t *parent_sess =
-	    devman_parent_device_connect(EXCHANGE_SERIALIZE,
-	    ddf_dev_get_handle(dev), IPC_FLAG_BLOCKING);
+	    devman_parent_device_connect(ddf_dev_get_handle(dev),
+	    IPC_FLAG_BLOCKING);
 	if (!parent_sess)
 		return ENOMEM;
@@ -93,6 +93,6 @@
 {
 	async_sess_t *parent_sess =
-	    devman_parent_device_connect(EXCHANGE_SERIALIZE,
-	    ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
+	    devman_parent_device_connect(ddf_dev_get_handle(device),
+	    IPC_FLAG_BLOCKING);
 	if (!parent_sess)
 		return ENOMEM;
Index: uspace/drv/bus/usb/uhci/res.c
===================================================================
--- uspace/drv/bus/usb/uhci/res.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/bus/usb/uhci/res.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -55,6 +55,6 @@
 
 	async_sess_t *parent_sess =
-	    devman_parent_device_connect(EXCHANGE_SERIALIZE,
-	    ddf_dev_get_handle(dev), IPC_FLAG_BLOCKING);
+	    devman_parent_device_connect(ddf_dev_get_handle(dev),
+	    IPC_FLAG_BLOCKING);
 	if (!parent_sess)
 		return ENOMEM;
@@ -91,6 +91,6 @@
 {
 	async_sess_t *parent_sess =
-	    devman_parent_device_connect(EXCHANGE_SERIALIZE,
-	    ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
+	    devman_parent_device_connect(ddf_dev_get_handle(device),
+	    IPC_FLAG_BLOCKING);
 	if (!parent_sess)
 		return ENOMEM;
@@ -112,5 +112,5 @@
 
 	async_sess_t *parent_sess = devman_parent_device_connect(
-	    EXCHANGE_SERIALIZE, ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
+	    ddf_dev_get_handle(device), IPC_FLAG_BLOCKING);
 	if (!parent_sess)
 		return ENOMEM;
Index: uspace/drv/bus/usb/uhcirh/main.c
===================================================================
--- uspace/drv/bus/usb/uhcirh/main.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/bus/usb/uhcirh/main.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -131,6 +131,6 @@
 {
 	async_sess_t *parent_sess =
-	    devman_parent_device_connect(EXCHANGE_SERIALIZE,
-	    ddf_dev_get_handle(dev), IPC_FLAG_BLOCKING);
+	    devman_parent_device_connect(ddf_dev_get_handle(dev),
+	    IPC_FLAG_BLOCKING);
 	if (!parent_sess)
 		return ENOMEM;
Index: uspace/drv/char/grlib_uart/grlib_uart.c
===================================================================
--- uspace/drv/char/grlib_uart/grlib_uart.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/char/grlib_uart/grlib_uart.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -381,6 +381,5 @@
 	
 	/* Connect to the parent's driver. */
-	async_sess_t *parent_sess = ddf_dev_parent_sess_create(ns->dev,
-	    EXCHANGE_SERIALIZE);
+	async_sess_t *parent_sess = ddf_dev_parent_sess_create(ns->dev);
 	if (parent_sess == NULL) {
 		ddf_msg(LVL_ERROR, "Failed to connect to parent driver of "
Index: uspace/drv/char/i8042/main.c
===================================================================
--- uspace/drv/char/i8042/main.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/char/i8042/main.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -61,6 +61,5 @@
 	assert(dev);
 	
-	async_sess_t *parent_sess = ddf_dev_parent_sess_create(
-	    dev, EXCHANGE_SERIALIZE);
+	async_sess_t *parent_sess = ddf_dev_parent_sess_create(dev);
 	if (parent_sess == NULL)
 		return ENOMEM;
Index: uspace/drv/char/ns8250/ns8250.c
===================================================================
--- uspace/drv/char/ns8250/ns8250.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/char/ns8250/ns8250.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -391,5 +391,5 @@
 	
 	/* Connect to the parent's driver. */
-	parent_sess = ddf_dev_parent_sess_create(ns->dev, EXCHANGE_SERIALIZE);
+	parent_sess = ddf_dev_parent_sess_create(ns->dev);
 	if (parent_sess == NULL) {
 		ddf_msg(LVL_ERROR, "Failed to connect to parent driver of "
Index: uspace/drv/char/pl050/pl050.c
===================================================================
--- uspace/drv/char/pl050/pl050.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/char/pl050/pl050.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -167,6 +167,5 @@
 	pl050->buf_rp = pl050->buf_wp = 0;
 
-	pl050->parent_sess = ddf_dev_parent_sess_create(pl050->dev,
-	    EXCHANGE_SERIALIZE);
+	pl050->parent_sess = ddf_dev_parent_sess_create(pl050->dev);
 	if (pl050->parent_sess == NULL) {
 		ddf_msg(LVL_ERROR, "Failed connecitng parent driver.");
Index: uspace/drv/char/ps2mouse/ps2mouse.c
===================================================================
--- uspace/drv/char/ps2mouse/ps2mouse.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/char/ps2mouse/ps2mouse.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -116,5 +116,5 @@
 {
 	mouse->client_sess = NULL;
-	mouse->parent_sess = ddf_dev_parent_sess_create(dev, EXCHANGE_SERIALIZE);
+	mouse->parent_sess = ddf_dev_parent_sess_create(dev);
 	if (!mouse->parent_sess)
 		return ENOMEM;
Index: uspace/drv/char/xtkbd/xtkbd.c
===================================================================
--- uspace/drv/char/xtkbd/xtkbd.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/char/xtkbd/xtkbd.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -417,5 +417,5 @@
 	
 	kbd->client_sess = NULL;
-	kbd->parent_sess = ddf_dev_parent_sess_create(dev, EXCHANGE_SERIALIZE);
+	kbd->parent_sess = ddf_dev_parent_sess_create(dev);
 	
 	if (!kbd->parent_sess) {
Index: uspace/drv/time/cmos-rtc/cmos-rtc.c
===================================================================
--- uspace/drv/time/cmos-rtc/cmos-rtc.c	(revision 048cd69e69ce8a5ca8bbf5d8a5b5451745dca93a)
+++ uspace/drv/time/cmos-rtc/cmos-rtc.c	(revision bae1e1f6864fcff51386ca7dda92f703816ffeef)
@@ -213,5 +213,5 @@
 	/* Connect to the parent's driver */
 
-	parent_sess = ddf_dev_parent_sess_create(rtc->dev, EXCHANGE_SERIALIZE);
+	parent_sess = ddf_dev_parent_sess_create(rtc->dev);
 	if (!parent_sess) {
 		ddf_msg(LVL_ERROR, "Failed to connect to parent driver\