spi: pxa2xx: Setup maximum supported DMA transfer length

When the commit b6ced294fb61

   ("spi: pxa2xx: Switch to SPI core DMA mapping functionality")

switches to SPI core provided DMA helpers, it missed to setup maximum
supported DMA transfer length for the controller and thus users
mistakenly try to send more data than supported with the following
warning:

  ili9341 spi-PRP0001:01: DMA disabled for transfer length 153600 greater than 65536

Setup maximum supported DMA transfer length in order to make users know
the limit.

Fixes: b6ced294fb61 ("spi: pxa2xx: Switch to SPI core DMA mapping functionality")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index d84b893a64d7e7ba922c158bbc7afbd907f68dbe..3e82eaad0f2d913a6e1686f50dfa31d9680349f4 100644 (file)
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -1696,6 +1696,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
                        platform_info->enable_dma = false;
                } else {
                        master->can_dma = pxa2xx_spi_can_dma;
+                       master->max_dma_len = MAX_DMA_LEN;
                }
        }