diff --git a/drivers/staging/nvec/nvec.c b/drivers/staging/nvec/nvec.c
index 263774e6a78c..e9af66a08448 100644
--- a/drivers/staging/nvec/nvec.c
+++ b/drivers/staging/nvec/nvec.c
@@ -648,7 +648,6 @@ static irqreturn_t nvec_interrupt(int irq, void *dev)
 		break;
 	case 2:		/* first byte after command */
 		if (status == (I2C_SL_IRQ | RNW | RCVD)) {
-			udelay(33);
 			if (nvec->rx->data[0] != 0x01) {
 				dev_err(nvec->dev,
 					"Read without prior read command\n");
@@ -660,6 +659,9 @@ static irqreturn_t nvec_interrupt(int irq, void *dev)
 			nvec_tx_set(nvec);
 			to_send = nvec->tx->data[0];
 			nvec->tx->pos = 1;
+			/* delay ACK due to AP20 HW Bug
+			   do not replace by usleep_range */
+			udelay(33);
 		} else if (status == (I2C_SL_IRQ)) {
 			nvec->rx->data[1] = received;
 			nvec->rx->pos = 2;