diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 3fdab563fec25f405a7903b8c13002206d47d45e..f5a60912c27187932d6c770cc274292dd2b9afa8 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -726,6 +726,7 @@ void ide_setup_ports (	hw_regs_t *hw,
 {
 	int i;
 
+	memset(hw, 0, sizeof(hw_regs_t));
 	for (i = 0; i < IDE_NR_PORTS; i++) {
 		if (offsets[i] == -1) {
 			switch(i) {
diff --git a/drivers/ide/legacy/q40ide.c b/drivers/ide/legacy/q40ide.c
index 2a78b792f7fb11ba3a621b397f0058a328c04021..434a94faa3b7202792ad5c05aa60144c3c59dbf3 100644
--- a/drivers/ide/legacy/q40ide.c
+++ b/drivers/ide/legacy/q40ide.c
@@ -80,6 +80,7 @@ void q40_ide_setup_ports ( hw_regs_t *hw,
 {
 	int i;
 
+	memset(hw, 0, sizeof(hw_regs_t));
 	for (i = 0; i < IDE_NR_PORTS; i++) {
 		/* BIG FAT WARNING: 
 		   assumption: only DATA port is ever used in 16 bit mode */