Re: [PATCH] gpio: max7301: fix driver for use with CONFIG_VMAP_STACK

On Fri, Dec 7, 2018 at 2:07 PM Christophe Leroy christophe.leroy@c-s.fr wrote:

spi_read() and spi_write() require DMA-safe memory. When CONFIG_VMAP_STACK is selected, those functions cannot be used with buffers on stack.

This patch replaces calls to spi_read() and spi_write() by spi_write_then_read() which doesn't require DMA-safe buffers.

Fixes: 0c36ec314735 ("gpio: gpio driver for max7301 SPI GPIO expander") Cc: stable@vger.kernel.org Signed-off-by: Christophe Leroy christophe.leroy@c-s.fr

Patch applied for fixes.

Yours, Linus Walleij