[PATCH v2 0/2] introduce fallback to pio in spi core

Mark Brown broonie at kernel.org
Wed Jun 24 11:38:52 EDT 2020

On Wed, 17 Jun 2020 06:42:07 +0800, Robin Gong wrote:
> Introudce fallback pio way at spi core level so that the tx/rx buffer
> mapped by spi core for dma could be unmap and fallback pio again. Hence no
> need the below patch where 'dma_sync_sg_for_devic' to sync fresh data back
> into 'device' memory and sync to 'cpu' again in spi core.
> https://www.spinics.net/lists/arm-kernel/msg812236.html
> If you want to use this fallback feature, please set xfer->error with
> SPI_TRANS_FAIL_NO_START in case dma transfer failed(but no any data push
> into spi bus yet) in spi client driver and add 'master->fallback' checking
> in your can_dma() to ensure spi core can fallback to pio next time.
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next


[1/2] spi: introduce fallback to pio
      commit: 809b1b04df898b6d182069146231a3cbf5f2d9cc
[2/2] spi: imx: add fallback feature
      commit: 7a908832ace7543ca996303928bfed7190dd2cdd

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
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