On Thursday 25 June 2009, Marek Szyprowski wrote:
> --- a/drivers/spi/spi_bitbang.c
> +++ b/drivers/spi/spi_bitbang.c
> @@ -392,6 +392,22 @@ int spi_bitbang_transfer(struct spi_device *spi, struct
> spi_message *m)
> unsigned long flags;
> int status = 0;
>
> + if (spi->master->flags & SPI_MASTER_NO_RX) {
> + struct spi_transfer *xfer;
> + list_for_each_entry(xfer, &m->transfers, transfer_list) {
> + if (xfer->rx_buf)
> + return -EINVAL;
> + }
> + }
Actually these two loops should merge, and likely move with
spi_async() into the spi.c core code ... I'll split this
support into a separate patch.
> +
> + if (spi->master->flags & SPI_MASTER_NO_TX) {
> + struct spi_transfer *xfer;
> + list_for_each_entry(xfer, &m->transfers, transfer_list) {
> + if (xfer->tx_buf)
> + return -EINVAL;
> + }
> + }
> +
> m->actual_length = 0;
> m->status = -EINPROGRESS;
>
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