The driver needs to shift the word bit after reading the mosi bit. Otherwise the return word will have an Off-by-one bit value. Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx> --- drivers/spi/spi-bitbang-txrx.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-bitbang-txrx.h b/drivers/spi/spi-bitbang-txrx.h index c616e41..b6e348d 100644 --- a/drivers/spi/spi-bitbang-txrx.h +++ b/drivers/spi/spi-bitbang-txrx.h @@ -61,10 +61,10 @@ bitbang_txrx_be_cpha0(struct spi_device *spi, spidelay(nsecs); /* sample MSB (from slave) on leading edge */ - word <<= 1; if ((flags & SPI_MASTER_NO_RX) == 0) word |= getmiso(spi); setsck(spi, cpol); + word <<= 1; } return word; } @@ -89,9 +89,9 @@ bitbang_txrx_be_cpha1(struct spi_device *spi, spidelay(nsecs); /* sample MSB (from slave) on trailing edge */ - word <<= 1; if ((flags & SPI_MASTER_NO_RX) == 0) word |= getmiso(spi); + word <<= 1; } return word; } -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html