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spi: pxa2xx: Setup maximum supported DMA transfer length

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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>
This commit is contained in:
Andy Shevchenko 2019-02-19 23:21:28 +03:00 committed by Greg Kroah-Hartman
parent 1a3f244a76
commit b8a811513a
1 changed files with 1 additions and 0 deletions
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1
drivers/spi/spi-pxa2xx.c
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@ -1668,6 +1668,7 @@ 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;
}
}