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spi: Add can_dma like interface for spi_flash_read

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Add an interface analogous to ->can_dma() for spi_flash_read()
interface. This will enable SPI controller drivers to inform SPI core
when not to do DMA mappings.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vignesh R
2017-04-11 17:22:24 +05:30
committed by Mark Brown
parent cb3c8e5ade
commit 2bca34455b
2 changed files with 5 additions and 1 deletions
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2
drivers/spi/spi.c
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@@ -2811,7 +2811,7 @@ int spi_flash_read(struct spi_device *spi,
mutex_lock(&master->bus_lock_mutex);
mutex_lock(&master->io_mutex);
if (master->dma_rx) {
if (master->dma_rx && master->spi_flash_can_dma(spi, msg)) {
rx_dev = master->dma_rx->device->dev;
ret = spi_map_buf(master, rx_dev, &msg->rx_sg,
msg->buf, msg->len,