spi: spi-fsl-dspi: Fill actual_length when doing DMA transfer
Upper layer users of SPI device drivers may rely on 'actual_length', so it is important that information is correctly reported. One such example is spi_mem_exec_op() function that will fail if 'actual_length' of the data transferred is not what was requested. Add necessary code to populate 'actual_length. Cc: Mark Brown <broonie@kernel.org> Cc: Sanchayan Maity <maitysanchayan@gmail.com> Cc: Stefan Agner <stefan@agner.ch> Cc: cphealy@gmail.com Cc: linux-spi@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -358,6 +358,7 @@ static int dspi_dma_xfer(struct fsl_dspi *dspi)
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{
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struct fsl_dspi_dma *dma = dspi->dma;
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struct device *dev = &dspi->pdev->dev;
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struct spi_message *message = dspi->cur_msg;
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int curr_remaining_bytes;
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int bytes_per_buffer;
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int ret = 0;
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@ -377,8 +378,10 @@ static int dspi_dma_xfer(struct fsl_dspi *dspi)
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goto exit;
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} else {
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curr_remaining_bytes -= dma->curr_xfer_len
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* dspi->bytes_per_word;
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const int len =
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dma->curr_xfer_len * dspi->bytes_per_word;
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curr_remaining_bytes -= len;
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message->actual_length += len;
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if (curr_remaining_bytes < 0)
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curr_remaining_bytes = 0;
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}
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