Unverified Commit ef070b4e authored Feb 19, 2019 by Andy Shevchenko Committed by Mark Brown Feb 20, 2019

spi: pxa2xx: Setup maximum supported DMA transfer length



When the commit b6ced294

   ("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: b6ced294 ("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

parent 673c865e

drivers/spi/spi-pxa2xx.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}
		}

Admin message