diff --git a/drivers/staging/iio/ring_sw.c b/drivers/staging/iio/ring_sw.c
index f8de45dc4b6e3528b70ed2ce9fe91b65f8cb753d..5ee3e4533515d7c2bb6669c1582ba16c356b94ed 100644
--- a/drivers/staging/iio/ring_sw.c
+++ b/drivers/staging/iio/ring_sw.c
@@ -295,7 +295,7 @@ int iio_read_last_from_sw_ring(struct iio_sw_ring_buffer *ring,
 		return -EAGAIN;
 	memcpy(data, last_written_p_copy, ring->buf.bpd);
 
-	if (unlikely(ring->last_written_p >= last_written_p_copy))
+	if (unlikely(ring->last_written_p != last_written_p_copy))
 		goto again;
 
 	iio_unmark_sw_rb_in_use(&ring->buf);