Commit 12858823 authored Jan 12, 2018 by Girish Mahadevan

spi: spi-geni-qcom: Modify GSI Rx transfer issue logic



In GSI mode, make the Rx channel dma_engine calls conditional to if
the current transfer being processed has any Rx related trasaction
rather than the total number of rx_eot accumulated by the master for
a given message.
This will impact cases where a message does a full-duplex transfer
followed by a half-duplex Tx only transfer.

Change-Id: I81a170451299011313277fd9af9e1118bb001ec0
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>

parent af4ea937

drivers/spi/spi-geni-qcom.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -647,11 +647,11 @@ static int setup_gsi_xfer(struct spi_transfer *xfer,
		&mas->gsi[mas->num_xfers].desc_cb;
		mas->gsi[mas->num_xfers].tx_cookie =
		dmaengine_submit(mas->gsi[mas->num_xfers].tx_desc);
		if (mas->num_rx_eot)
		if (cmd & SPI_RX_ONLY)
		mas->gsi[mas->num_xfers].rx_cookie =
		dmaengine_submit(mas->gsi[mas->num_xfers].rx_desc);
		dma_async_issue_pending(mas->tx);
		if (mas->num_rx_eot)
		if (cmd & SPI_RX_ONLY)
		dma_async_issue_pending(mas->rx);
		mas->num_xfers++;
		return ret;