Index: uspace/drv/bus/usb/vhc/hub/virthubops.c
===================================================================
--- uspace/drv/bus/usb/vhc/hub/virthubops.c	(revision 3de67b4cff4994af4a74b190c5b094f45c15b561)
+++ uspace/drv/bus/usb/vhc/hub/virthubops.c	(revision 951f32ce8d4ff8508530ae4ef61d13827f1b2c0f)
@@ -299,5 +299,5 @@
     size_t *act_size)
 {
-	int rc;
+	int rc = ENOTSUP;
 	size_t port = request->index - 1;
 	usb_hub_class_feature_t feature = request->value;
Index: uspace/drv/char/ps2mouse/ps2mouse.c
===================================================================
--- uspace/drv/char/ps2mouse/ps2mouse.c	(revision 3de67b4cff4994af4a74b190c5b094f45c15b561)
+++ uspace/drv/char/ps2mouse/ps2mouse.c	(revision 951f32ce8d4ff8508530ae4ef61d13827f1b2c0f)
@@ -70,6 +70,7 @@
 #define PS2_BUTTON_MASK(button) (1 << button)
 
-#define MOUSE_READ_BYTE_TEST(sess, value) \
+#define MOUSE_READ_BYTE_TEST(sess, value_) \
 do { \
+	uint8_t value = (value_); \
 	uint8_t data = 0; \
 	const ssize_t size = chardev_read(sess, &data, 1); \
@@ -78,13 +79,14 @@
 		return size < 0 ? size : EIO; \
 	} \
-	if (data != (value)) { \
+	if (data != value) { \
 		ddf_msg(LVL_DEBUG, "Failed testing byte: got %hhx vs. %hhx)", \
-		    data, (value)); \
+		    data, value); \
 		return EIO; \
 	} \
 } while (0)
 
-#define MOUSE_WRITE_BYTE(sess, value) \
+#define MOUSE_WRITE_BYTE(sess, value_) \
 do { \
+	uint8_t value = (value_); \
 	uint8_t data = (value); \
 	const ssize_t size = chardev_write(sess, &data, 1); \
Index: uspace/drv/nic/rtl8139/driver.c
===================================================================
--- uspace/drv/nic/rtl8139/driver.c	(revision 3de67b4cff4994af4a74b190c5b094f45c15b561)
+++ uspace/drv/nic/rtl8139/driver.c	(revision 951f32ce8d4ff8508530ae4ef61d13827f1b2c0f)
@@ -620,5 +620,5 @@
 		if (size == 0 || size > RTL8139_FRAME_MAX_LENGTH) {
 			ddf_msg(LVL_ERROR, "Receiver error -> receiver reset (size: %4" PRIu16 ", "
-			    "header 0x%4" PRIx16 ". Offset: %d)", size, frame_header,
+			    "header 0x%4" PRIx32 ". Offset: %" PRIu16 ")", size, frame_header,
 			    rx_offset);
 			goto rx_err;