mmc: renesas_sdhi_internal_dmac: set scatter/gather max segment size

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Fix warning when running with CONFIG_DMA_API_DEBUG_SG=y by allocating a
device_dma_parameters structure and filling in the max segment size. The
size used is the result of a discussion with Renesas hardware engineers
and unfortunately not found in the datasheet.

  renesas_sdhi_internal_dmac ee140000.sd: DMA-API: mapping sg segment
  longer than device claims to support [len=126976] [max=65536]

Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
[wsa: simplified some logic after validating intended dma_parms life cycle
      and added comment]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

...

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Niklas Söderlund 2018-09-13 16:47:08 +02:00 • committed by Ulf Hansson

parent 07bafc1e35

commit 54541815b4

1 changed files with 8 additions and 0 deletions

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drivers/mmc/host/renesas_sdhi_internal_dmac.c

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