diff --git a/drivers/staging/comedi/drivers/ni_pcimio.c b/drivers/staging/comedi/drivers/ni_pcimio.c
index 3b2bdebbca5983ae2cc87f552301101ae930f32a..e78739cce1754dd459b22a38d2e93989b182a4bb 100644
--- a/drivers/staging/comedi/drivers/ni_pcimio.c
+++ b/drivers/staging/comedi/drivers/ni_pcimio.c
@@ -1183,19 +1183,19 @@ static int pcimio_auto_attach(struct comedi_device *dev,
 		return ret;
 
 	devpriv->ai_mite_ring = mite_alloc_ring(devpriv->mite);
-	if (devpriv->ai_mite_ring == NULL)
+	if (!devpriv->ai_mite_ring)
 		return -ENOMEM;
 	devpriv->ao_mite_ring = mite_alloc_ring(devpriv->mite);
-	if (devpriv->ao_mite_ring == NULL)
+	if (!devpriv->ao_mite_ring)
 		return -ENOMEM;
 	devpriv->cdo_mite_ring = mite_alloc_ring(devpriv->mite);
-	if (devpriv->cdo_mite_ring == NULL)
+	if (!devpriv->cdo_mite_ring)
 		return -ENOMEM;
 	devpriv->gpct_mite_ring[0] = mite_alloc_ring(devpriv->mite);
-	if (devpriv->gpct_mite_ring[0] == NULL)
+	if (!devpriv->gpct_mite_ring[0])
 		return -ENOMEM;
 	devpriv->gpct_mite_ring[1] = mite_alloc_ring(devpriv->mite);
-	if (devpriv->gpct_mite_ring[1] == NULL)
+	if (!devpriv->gpct_mite_ring[1])
 		return -ENOMEM;
 
 	if (devpriv->is_m_series)