diff --git a/dde_linux/src/drivers/usb/arm/platform/platform.cc b/dde_linux/src/drivers/usb/arm/platform/platform.cc
index dbd8a061f..aa361fdfc 100644
--- a/dde_linux/src/drivers/usb/arm/platform/platform.cc
+++ b/dde_linux/src/drivers/usb/arm/platform/platform.cc
@@ -398,7 +398,7 @@ void platform_hcd_init(Services *services)
 	/*
 	 * Needed for DMA buffer allocation. See 'hcd_buffer_alloc' in 'buffer.c'
 	 */
-	static u64 dma_mask = ~(u32)0;
+	static u64 dma_mask = ~(u64)0;
 	pdev->dev.dma_mask = &dma_mask;
 	pdev->dev.coherent_dma_mask = ~0;
 
diff --git a/dde_linux/src/drivers/usb/dma.h b/dde_linux/src/drivers/usb/dma.h
index 65ac83d93..70f3c7996 100644
--- a/dde_linux/src/drivers/usb/dma.h
+++ b/dde_linux/src/drivers/usb/dma.h
@@ -55,7 +55,7 @@ namespace Genode {
 			}
 
 			addr_t base() const { return _base; };
-			addr_t end() const { return _base + SIZE -1; }
+			addr_t end()  const { return _base + SIZE - 1; }
 
 			/**
 			 * Alloc 'size' bytes of DMA memory
@@ -67,7 +67,6 @@ namespace Genode {
 					PERR("DMA of %zu bytes allocation failed", size);
 					return 0;
 				}
-
 				return addr;
 			}
 
diff --git a/dde_linux/src/drivers/usb/lx_emul.cc b/dde_linux/src/drivers/usb/lx_emul.cc
index 177f27969..f86a307a4 100644
--- a/dde_linux/src/drivers/usb/lx_emul.cc
+++ b/dde_linux/src/drivers/usb/lx_emul.cc
@@ -610,7 +610,7 @@ static void* _alloc(size_t size, int align, dma_addr_t *dma)
 		return 0;
 
 	*dma = (dma_addr_t)Genode::Dma::pool()->phys_addr(addr);
-	dde_kit_log(DEBUG_DMA, "DMA pool alloc addr: %p size %zx align: %d, pysh: %lx", addr, size, align, *dma);
+	dde_kit_log(DEBUG_DMA, "DMA pool alloc addr: %p size %zx align: %d, phys: %lx", addr, size, align, *dma);
 	memset(addr, 0, size);
 	return addr;
 }
diff --git a/dde_linux/src/drivers/usb/main.cc b/dde_linux/src/drivers/usb/main.cc
index 10db6a80f..2c4b36893 100644
--- a/dde_linux/src/drivers/usb/main.cc
+++ b/dde_linux/src/drivers/usb/main.cc
@@ -70,10 +70,7 @@ static void init(Services *services)
 		module_usb_kbd_init();
 	}
 
-	/*
-	 * Host controller.
-	 *
-	 */
+	/* host controller */
 	platform_hcd_init(services);
 
 	/* storage */
diff --git a/dde_linux/src/drivers/usb/pci_driver.cc b/dde_linux/src/drivers/usb/pci_driver.cc
index d0fcd1c68..60d325337 100644
--- a/dde_linux/src/drivers/usb/pci_driver.cc
+++ b/dde_linux/src/drivers/usb/pci_driver.cc
@@ -93,6 +93,11 @@ class Pci_driver
 			_dev->revision     = client.config_read(REV, Device::ACCESS_8BIT);
 			_dev->dev.driver   = &_drv->driver;
 
+			/* dummy dma mask used to mark device as DMA capable */
+			static u64 dma_mask = ~(u64)0;
+			_dev->dev.dma_mask = &dma_mask;
+			_dev->dev.coherent_dma_mask = ~0;
+
 			/* read interrupt line */
 			_dev->irq          = client.config_read(IRQ, Device::ACCESS_8BIT);
 
@@ -221,6 +226,7 @@ int pci_register_driver(struct pci_driver *drv)
 
 	Pci::Device_capability cap = pci.first_device();
 	Pci::Device_capability old;
+	bool found = false;
 	while (cap.valid()) {
 
 		uint8_t bus, dev, func;
@@ -228,11 +234,11 @@ int pci_register_driver(struct pci_driver *drv)
 		client.bus_address(&bus, &dev, &func);
 		dde_kit_log(DEBUG_PCI, "bus: %x  dev: %x func: %x", bus, dev, func);
 
-		Pci_driver *pci_drv= 0;
+		Pci_driver *pci_drv = 0;
 		try {
 			pci_drv = new (env()->heap()) Pci_driver(drv, cap);
 			pci.on_destruction(Pci::Connection::KEEP_OPEN);
-			return 0;
+			found = true;
 		} catch (...) {
 			destroy(env()->heap(), pci_drv);
 			pci_drv = 0;
@@ -243,7 +249,7 @@ int pci_register_driver(struct pci_driver *drv)
 		pci.release_device(old);
 	}
 
-	return -ENODEV;
+	return found ? 0 : -ENODEV;
 }
 
 
@@ -276,38 +282,38 @@ unsigned int pci_resource_flags(struct pci_dev *dev, unsigned bar)
 }
 
 
-int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn, int, u8 *val)
+int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int, int where, u8 *val)
 {
 	Pci_driver *drv = (Pci_driver *)bus;
-	drv->config_read(devfn, val);
-	dde_kit_log(DEBUG_PCI, "READ %p: %x", drv, *val);
+	drv->config_read(where, val);
+	dde_kit_log(DEBUG_PCI, "READ %p: where: %x val: %x", drv, where, *val);
 	return 0;
 }
 
 
-int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn, int, u16 *val)
+int pci_bus_read_config_word(struct pci_bus *bus, unsigned int, int where, u16 *val)
 { 
 	Pci_driver *drv = (Pci_driver *)bus;
-	drv->config_read(devfn, val);
-	dde_kit_log(DEBUG_PCI, "READ %p: %x", drv, *val);
+	drv->config_read(where, val);
+	dde_kit_log(DEBUG_PCI, "READ %p: where: %x val: %x", drv, where, *val);
 	return 0; 
 }
 
 
-int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn, int, u16 val)
+int pci_bus_write_config_word(struct pci_bus *bus, unsigned int, int where, u16 val)
 {
 	Pci_driver *drv = (Pci_driver *)bus;
-	dde_kit_log(DEBUG_PCI, "WRITE %p: %x", drv, val);
-	drv->config_write(devfn, val);
+	dde_kit_log(DEBUG_PCI, "WRITE %p: where: %x val: %x", drv, where, val);
+	drv->config_write(where, val);
 	return 0;
 }
 
 
-int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn, int, u8 val)
+int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int, int where, u8 val)
 {
 	Pci_driver *drv = (Pci_driver *)bus;
-	dde_kit_log(DEBUG_PCI, "WRITE %p: %x", drv, val);
-	drv->config_write(devfn, val);
+	dde_kit_log(DEBUG_PCI, "WRITE %p: where: %x val: %x", drv, where, val);
+	drv->config_write(where, val);
 	return 0;
 }
 
diff --git a/dde_linux/src/drivers/usb/signal/irq.cc b/dde_linux/src/drivers/usb/signal/irq.cc
index 9c2a5e048..aa3092093 100644
--- a/dde_linux/src/drivers/usb/signal/irq.cc
+++ b/dde_linux/src/drivers/usb/signal/irq.cc
@@ -83,7 +83,10 @@ class Irq_context : public Driver_context,
 			_ctx_cap(_signal->receiver()->manage(this))
 		{
 			/* register at DDE (shared) */
-			dde_kit_interrupt_attach(_irq, 1, 0, _dde_handler, this);
+			int ret = dde_kit_interrupt_attach(_irq, 0, 0, _dde_handler, this);
+			if (ret)
+				PERR("Interrupt attach return %d for IRQ %u", ret, irq);
+
 			dde_kit_interrupt_enable(_irq);
 			_list()->insert(this);
 		}