tree 51cea54a7a78747e6af42382232037a8ec12ce30
parent 673c865efbdc5fec3cc525c46d71844d42c60072
author Andy Shevchenko <andriy.shevchenko@linux.intel.com> 1550607688 +0300
committer Mark Brown <broonie@kernel.org> 1550682854 +0000
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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