dmaengine: stm32-dma: fix max items per transfer

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Having 0 in item counter register is valid and stands for a "No or Ended
transfer". Therefore valid transfer starts from @+0 to @+0xFFFE leading to
unaligned scatter gather at boundary. Thus it's safer to round down this
value on its FIFO size (16 Bytes).

Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

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Pierre Yves MORDRET 2018-03-13 17:42:04 +01:00 • committed by Vinod Koul

parent c2d86b1cd6

commit 80a76952a5

1 changed files with 11 additions and 8 deletions

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19

drivers/dma/stm32-dma.c

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