[PATCH] spi: Ensure memory used for spi_write_then_read() is DMA safe

Use GFP_DMA in order to ensure that the memory we allocate for transfers in spi_write_then_read() can be DMAed. On most platforms this will have no effect. Signed-off-by: Mark Brown --- drivers/spi/spi.c |3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi.c b

Re: [PATCH 1/3] spi: Add helper functions for setting up transfers

On Wed, Jan 09, 2013 at 06:31:09PM +0100, Lars-Peter Clausen wrote: > The second function spi_sync_transfer() takes a SPI device and an array of > spi_transfers. It will allocate a new spi_message (on the stack) and add all > transfers in the array to the message. Finally it will call spi_sync() o