Merge branches 'spi-core' and 'spi-tegra' into spi-next

drivers/spi/spi-tegra20-slink.c

@@ -727,8 +727,7 @@ static int tegra_slink_start_transfer_one(struct spi_device *spi,
 	unsigned long command;
 	unsigned long command2;
 
-	bits_per_word = t->bits_per_word ? t->bits_per_word :
-					spi->bits_per_word;
+	bits_per_word = t->bits_per_word;
 	speed = t->speed_hz ? t->speed_hz : spi->max_speed_hz;
 	if (!speed)
 		speed = tspi->spi_max_frequency;
@@ -1110,8 +1109,8 @@ const struct tegra_slink_chip_data tegra20_spi_cdata = {
 };
 
 static struct of_device_id tegra_slink_of_match[] __devinitconst = {
-	{ .compatible = "nvidia,tegra20-slink", .data = &tegra20_spi_cdata, },
 	{ .compatible = "nvidia,tegra30-slink", .data = &tegra30_spi_cdata, },
+	{ .compatible = "nvidia,tegra20-slink", .data = &tegra20_spi_cdata, },
 	{}
 };
 MODULE_DEVICE_TABLE(of, tegra_slink_of_match);

drivers/spi/spi.c

@@ -1156,7 +1156,7 @@ EXPORT_SYMBOL_GPL(spi_busnum_to_master);
 int spi_setup(struct spi_device *spi)
 {
 	unsigned	bad_bits;
-	int		status;
+	int		status = 0;
 
 	/* help drivers fail *cleanly* when they need options
 	 * that aren't supported with their current master
@@ -1171,7 +1171,8 @@ int spi_setup(struct spi_device *spi)
 	if (!spi->bits_per_word)
 		spi->bits_per_word = 8;
 
-	status = spi->master->setup(spi);
+	if (spi->master->setup)
+		status = spi->master->setup(spi);
 
 	dev_dbg(&spi->dev, "setup mode %d, %s%s%s%s"
 				"%u bits/w, %u Hz max --> %d\n",
@@ -1190,6 +1191,7 @@ EXPORT_SYMBOL_GPL(spi_setup);
 static int __spi_async(struct spi_device *spi, struct spi_message *message)
 {
 	struct spi_master *master = spi->master;
+	struct spi_transfer *xfer;
 
 	/* Half-duplex links include original MicroWire, and ones with
 	 * only one data pin like SPI_3WIRE (switches direction) or where
@@ -1198,7 +1200,6 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message)
 	 */
 	if ((master->flags & SPI_MASTER_HALF_DUPLEX)
 			|| (spi->mode & SPI_3WIRE)) {
-		struct spi_transfer *xfer;
 		unsigned flags = master->flags;
 
 		list_for_each_entry(xfer, &message->transfers, transfer_list) {
@@ -1211,6 +1212,15 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message)
 		}
 	}
 
+	/**
+	 * Set transfer bits_per_word as spi device default if it is not
+	 * set for this transfer.
+	 */
+	list_for_each_entry(xfer, &message->transfers, transfer_list) {
+		if (!xfer->bits_per_word)
+			xfer->bits_per_word = spi->bits_per_word;
+	}
+
 	message->spi = spi;
 	message->status = -EINPROGRESS;
 	return master->transfer(spi, message);