Applied "spi: fsl-espi: remove element status from struct fsl_espi_transfer" to the spi tree

[Mark Brown <broonie@xxxxxxxxxx>]

The patch

   spi: fsl-espi: remove element status from struct fsl_espi_transfer

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From e33a3ade909194ec2ca633a53b428d4dac853f8a Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Date: Wed, 7 Sep 2016 22:51:10 +0200
Subject: [PATCH] spi: fsl-espi: remove element status from struct
 fsl_espi_transfer

Use the return values of the functions in the call chain to transport
status information instead of using an element in struct
fsl_espi_transfer for this.

This is more in line with the general approach how to handle status
information and is one step further to eventually get rid of
struct fsl_espi_transfer completely.

Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
 drivers/spi/spi-fsl-espi.c | 47 +++++++++++++++++++++++++---------------------
 1 file changed, 26 insertions(+), 21 deletions(-)

diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c
index 8e6ef9b153d7..5f01b6595442 100644
--- a/drivers/spi/spi-fsl-espi.c
+++ b/drivers/spi/spi-fsl-espi.c
@@ -42,7 +42,6 @@ struct fsl_espi_transfer {
 	void *rx_buf;
 	unsigned len;
 	unsigned actual_length;
-	int status;
 };
 
 /* eSPI Controller mode register definitions */
@@ -269,14 +268,14 @@ static int fsl_espi_bufs(struct spi_device *spi, struct spi_transfer *t)
 	return mpc8xxx_spi->count;
 }
 
-static void fsl_espi_do_trans(struct spi_message *m,
-				struct fsl_espi_transfer *tr)
+static int fsl_espi_do_trans(struct spi_message *m,
+			     struct fsl_espi_transfer *tr)
 {
 	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;
-	int status = 0;
+	int ret = 0;
 
 	memset(&trans, 0, sizeof(trans));
 
@@ -285,10 +284,9 @@ static void fsl_espi_do_trans(struct spi_message *m,
 	list_for_each_entry(t, &m->transfers, transfer_list) {
 		if ((first->bits_per_word != t->bits_per_word) ||
 			(first->speed_hz != t->speed_hz)) {
-			espi_trans->status = -EINVAL;
 			dev_err(mspi->dev,
 				"bits_per_word/speed_hz should be same for the same SPI transfer\n");
-			return;
+			return -EINVAL;
 		}
 
 		trans.speed_hz = t->speed_hz;
@@ -303,52 +301,59 @@ static void fsl_espi_do_trans(struct spi_message *m,
 	fsl_espi_setup_transfer(spi, &trans);
 
 	if (trans.len)
-		status = fsl_espi_bufs(spi, &trans);
+		ret = fsl_espi_bufs(spi, &trans);
 
-	if (status)
-		status = -EMSGSIZE;
+	if (ret)
+		ret = -EMSGSIZE;
 
 	if (trans.delay_usecs)
 		udelay(trans.delay_usecs);
 
-	espi_trans->status = status;
 	fsl_espi_setup_transfer(spi, NULL);
+
+	return ret;
 }
 
-static void fsl_espi_cmd_trans(struct spi_message *m,
-				struct fsl_espi_transfer *trans, u8 *rx_buff)
+static int fsl_espi_cmd_trans(struct spi_message *m,
+			      struct fsl_espi_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;
-	fsl_espi_do_trans(m, espi_trans);
+	ret = fsl_espi_do_trans(m, espi_trans);
 
 	espi_trans->actual_length = espi_trans->len;
+
+	return ret;
 }
 
-static void fsl_espi_rw_trans(struct spi_message *m,
-				struct fsl_espi_transfer *trans, u8 *rx_buff)
+static int fsl_espi_rw_trans(struct spi_message *m,
+			     struct fsl_espi_transfer *trans, u8 *rx_buff)
 {
 	struct mpc8xxx_spi *mspi = spi_master_get_devdata(m->spi->master);
 	unsigned int tx_only;
+	int ret;
 
 	tx_only = fsl_espi_copy_to_buf(m, mspi);
 
 	trans->tx_buf = mspi->local_buf;
 	trans->rx_buf = mspi->local_buf;
-	fsl_espi_do_trans(m, trans);
+	ret = fsl_espi_do_trans(m, trans);
 
-	if (!trans->status) {
+	if (!ret) {
 		/* If there is at least one RX byte then copy it to rx_buff */
 		if (trans->len > tx_only)
 			memcpy(rx_buff, trans->rx_buf + tx_only,
 			       trans->len - tx_only);
 		trans->actual_length += trans->len;
 	}
+
+	return ret;
 }
 
 static int fsl_espi_do_one_msg(struct spi_master *master,
@@ -358,6 +363,7 @@ static int fsl_espi_do_one_msg(struct spi_master *master,
 	u8 *rx_buf = NULL;
 	unsigned int xfer_len = 0;
 	struct fsl_espi_transfer espi_trans;
+	int ret;
 
 	list_for_each_entry(t, &m->transfers, transfer_list) {
 		if (t->rx_buf)
@@ -368,15 +374,14 @@ static int fsl_espi_do_one_msg(struct spi_master *master,
 
 	espi_trans.len = xfer_len;
 	espi_trans.actual_length = 0;
-	espi_trans.status = 0;
 
 	if (!rx_buf)
-		fsl_espi_cmd_trans(m, &espi_trans, NULL);
+		ret = fsl_espi_cmd_trans(m, &espi_trans, NULL);
 	else
-		fsl_espi_rw_trans(m, &espi_trans, rx_buf);
+		ret = fsl_espi_rw_trans(m, &espi_trans, rx_buf);
 
 	m->actual_length = espi_trans.actual_length;
-	m->status = espi_trans.status;
+	m->status = ret;
 	spi_finalize_current_message(master);
 	return 0;
 }
-- 
2.8.1

--
To unsubscribe from this list: send the line "unsubscribe linux-spi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html