spi: fsl-espi: eliminate struct fsl_espi_transfer

The remaining elements of struct fsl_espi_transfer are part of struct
spi_transfer anyway. So we can get rid of struct fsl_espi_transfer
and use a struct spi_transfer only.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-fsl-espi.c

@@ -37,12 +37,6 @@ struct fsl_espi_reg {
 	__be32 csmode[4];	/* 0x020 - 0x02c eSPI cs mode register */
 };
 
-struct fsl_espi_transfer {
-	const void *tx_buf;
-	void *rx_buf;
-	unsigned len;
-};
-
 /* eSPI Controller mode register definitions */
 #define SPMODE_ENABLE		(1 << 31)
 #define SPMODE_LOOP		(1 << 30)
@@ -267,17 +261,13 @@ static int fsl_espi_bufs(struct spi_device *spi, struct spi_transfer *t)
 	return mpc8xxx_spi->count;
 }
 
-static int fsl_espi_do_trans(struct spi_message *m,
-			     struct fsl_espi_transfer *tr)
+static int fsl_espi_do_trans(struct spi_message *m, struct spi_transfer *trans)
 {
 	struct spi_device *spi = m->spi;
 	struct mpc8xxx_spi *mspi = spi_master_get_devdata(spi->master);
-	struct fsl_espi_transfer *espi_trans = tr;
-	struct spi_transfer *t, *first, trans;
+	struct spi_transfer *t, *first;
 	int ret = 0;
 
-	memset(&trans, 0, sizeof(trans));
-
 	first = list_first_entry(&m->transfers, struct spi_transfer,
 			transfer_list);
 	list_for_each_entry(t, &m->transfers, transfer_list) {
@@ -288,25 +278,21 @@ static int fsl_espi_do_trans(struct spi_message *m,
 			return -EINVAL;
 		}
 
-		trans.speed_hz = t->speed_hz;
-		trans.bits_per_word = t->bits_per_word;
-		trans.delay_usecs = max(first->delay_usecs, t->delay_usecs);
+		trans->speed_hz = t->speed_hz;
+		trans->bits_per_word = t->bits_per_word;
+		trans->delay_usecs = max(first->delay_usecs, t->delay_usecs);
 	}
 
-	trans.len = espi_trans->len;
-	trans.tx_buf = espi_trans->tx_buf;
-	trans.rx_buf = espi_trans->rx_buf;
-
-	fsl_espi_setup_transfer(spi, &trans);
+	fsl_espi_setup_transfer(spi, trans);
 
-	if (trans.len)
-		ret = fsl_espi_bufs(spi, &trans);
+	if (trans->len)
+		ret = fsl_espi_bufs(spi, trans);
 
 	if (ret)
 		ret = -EMSGSIZE;
 
-	if (trans.delay_usecs)
-		udelay(trans.delay_usecs);
+	if (trans->delay_usecs)
+		udelay(trans->delay_usecs);
 
 	fsl_espi_setup_transfer(spi, NULL);
 
@@ -314,23 +300,22 @@ static int fsl_espi_do_trans(struct spi_message *m,
 }
 
 static int fsl_espi_cmd_trans(struct spi_message *m,
-			      struct fsl_espi_transfer *trans, u8 *rx_buff)
+			      struct spi_transfer *trans, u8 *rx_buff)
 {
 	struct mpc8xxx_spi *mspi = spi_master_get_devdata(m->spi->master);
-	struct fsl_espi_transfer *espi_trans = trans;
 	int ret;
 
 	fsl_espi_copy_to_buf(m, mspi);
 
-	espi_trans->tx_buf = mspi->local_buf;
-	espi_trans->rx_buf = mspi->local_buf;
-	ret = fsl_espi_do_trans(m, espi_trans);
+	trans->tx_buf = mspi->local_buf;
+	trans->rx_buf = mspi->local_buf;
+	ret = fsl_espi_do_trans(m, trans);
 
 	return ret;
 }
 
 static int fsl_espi_rw_trans(struct spi_message *m,
-			     struct fsl_espi_transfer *trans, u8 *rx_buff)
+			     struct spi_transfer *trans, u8 *rx_buff)
 {
 	struct mpc8xxx_spi *mspi = spi_master_get_devdata(m->spi->master);
 	unsigned int tx_only;
@@ -355,10 +340,9 @@ static int fsl_espi_rw_trans(struct spi_message *m,
 static int fsl_espi_do_one_msg(struct spi_master *master,
 			       struct spi_message *m)
 {
-	struct spi_transfer *t;
 	u8 *rx_buf = NULL;
 	unsigned int xfer_len = 0;
-	struct fsl_espi_transfer espi_trans;
+	struct spi_transfer *t, trans = {};
 	int ret;
 
 	list_for_each_entry(t, &m->transfers, transfer_list) {
@@ -368,14 +352,14 @@ static int fsl_espi_do_one_msg(struct spi_master *master,
 			xfer_len += t->len;
 	}
 
-	espi_trans.len = xfer_len;
+	trans.len = xfer_len;
 
 	if (!rx_buf)
-		ret = fsl_espi_cmd_trans(m, &espi_trans, NULL);
+		ret = fsl_espi_cmd_trans(m, &trans, NULL);
 	else
-		ret = fsl_espi_rw_trans(m, &espi_trans, rx_buf);
+		ret = fsl_espi_rw_trans(m, &trans, rx_buf);
 
-	m->actual_length = ret ? 0 : espi_trans.len;
+	m->actual_length = ret ? 0 : trans.len;
 
 	if (m->status == -EINPROGRESS)
 		m->status = ret;