Hello Mark, Here is a patchset which, IMO, is improving spi-mem support. The first 2 patches are fixing/improving the kerneldoc header associated to the spi_mem_op struct, and the last one is adding checks on the spi_mem_op object passed to spi_mem_{exec,supports}_op(). Regards, Boris Boris Brezillon (3): spi: spi-mem: Add missing description for data.nbytes field spi: spi-mem: Move the DMA-able constraint doc to the kerneldoc header spi: spi-mem: Add extra sanity checks on the op param drivers/spi/spi-mem.c | 54 ++++++++++++++++++++++++++++++++++++++++----- include/linux/spi/spi-mem.h | 7 +++--- 2 files changed, 52 insertions(+), 9 deletions(-) -- 2.14.1