Re: [PATCH] gpio: max7301: fix driver for use with CONFIG_VMAP_STACK
From: Linus Walleij
Date: Sat Dec 15 2018 - 19:15:15 EST
On Fri, Dec 7, 2018 at 2:07 PM Christophe Leroy <christophe.leroy@xxxxxx> 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@xxxxxxxxxxxxxxx>
> Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
Patch applied for fixes.