4.9-stable review patch. If anyone has any objections, please let me know.
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From: Andy Shevchenko andriy.shevchenko@linux.intel.com
commit ef070b4e4aa25bb5f8632ad196644026c11903bf upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/spi/spi-pxa2xx.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -1668,6 +1668,7 @@ static int pxa2xx_spi_probe(struct platf platform_info->enable_dma = false; } else { master->can_dma = pxa2xx_spi_can_dma; + master->max_dma_len = MAX_DMA_LEN; } }