diff --git a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3120.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3120.c
index 5d15acacc259..51cdecb211d6 100644
--- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3120.c
+++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3120.c
@@ -147,7 +147,7 @@ static int apci3120_ai_insn_read(struct comedi_device *dev,
 	struct apci3120_private *devpriv = dev->private;
 	unsigned int divisor;
 	unsigned int ns;
-	unsigned short us_TmpValue, i;
+	unsigned short us_TmpValue;
 
 	/*  fix conversion time to 10 us */
 	ns = 10000;
@@ -157,8 +157,6 @@ static int apci3120_ai_insn_read(struct comedi_device *dev,
 	devpriv->mode = 0;
 
 	if (insn->unused[0] == 222) {	/*  second insn read */
-		for (i = 0; i < insn->n; i++)
-			data[i] = devpriv->ui_AiReadData[i];
 	} else {
 		devpriv->tsk_Current = current;	/*  Save the current process task structure */
 
diff --git a/drivers/staging/comedi/drivers/addi_apci_3120.c b/drivers/staging/comedi/drivers/addi_apci_3120.c
index 572d545e7492..dc05b2f616ca 100644
--- a/drivers/staging/comedi/drivers/addi_apci_3120.c
+++ b/drivers/staging/comedi/drivers/addi_apci_3120.c
@@ -115,7 +115,6 @@ struct apci3120_private {
 	unsigned int osc_base;
 	unsigned int ui_AiNbrofChannels;
 	unsigned int ui_AiChannelList[32];
-	unsigned int ui_AiReadData[32];
 	unsigned short us_UseDma;
 	unsigned char b_DmaDoubleBuffer;
 	unsigned int ui_DmaActualBuffer;