[PATCH] spi: bitbang: initialize bits_per_word as specified by spi message

[Anatolij Gustschin <agust-ynQEQJNshbs@public.gmane.org>]

SPI protocol drivers can submit messages specifying needed bits_per_word
parameter for a message transfer. The bitbang driver currently ignores
bits_per_word given by a singe message and always uses master's
bits_per_word parameter. Only use master's bits_per_word when a
message didn't specify needed bits_per_word for ongoing transfer.

Signed-off-by: Anatolij Gustschin <agust-ynQEQJNshbs@public.gmane.org>
---
 drivers/spi/spi_bitbang.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi_bitbang.c b/drivers/spi/spi_bitbang.c
index 14a63f6..bb38c83 100644
--- a/drivers/spi/spi_bitbang.c
+++ b/drivers/spi/spi_bitbang.c
@@ -68,7 +68,7 @@ static unsigned bitbang_txrx_8(
 	unsigned		ns,
 	struct spi_transfer	*t
 ) {
-	unsigned		bits = spi->bits_per_word;
+	unsigned		bits = t->bits_per_word ? : spi->bits_per_word;
 	unsigned		count = t->len;
 	const u8		*tx = t->tx_buf;
 	u8			*rx = t->rx_buf;
@@ -94,7 +94,7 @@ static unsigned bitbang_txrx_16(
 	unsigned		ns,
 	struct spi_transfer	*t
 ) {
-	unsigned		bits = spi->bits_per_word;
+	unsigned		bits = t->bits_per_word ? : spi->bits_per_word;
 	unsigned		count = t->len;
 	const u16		*tx = t->tx_buf;
 	u16			*rx = t->rx_buf;
@@ -120,7 +120,7 @@ static unsigned bitbang_txrx_32(
 	unsigned		ns,
 	struct spi_transfer	*t
 ) {
-	unsigned		bits = spi->bits_per_word;
+	unsigned		bits = t->bits_per_word ? : spi->bits_per_word;
 	unsigned		count = t->len;
 	const u32		*tx = t->tx_buf;
 	u32			*rx = t->rx_buf;
-- 
1.7.1


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