Re: [PATCH] mtd: spinand: Fix Macronix ECC Status Read

[Boris Brezillon <bbrezillon@kernel.org>]

+Miquel

Hi Emil,

Can you please Cc the NAND and MTD maintainers next time?

On Thu, 20 Dec 2018 13:46:58 +0100
Emil Lenngren <emil.lenngren@gmail.com> wrote:

> The datasheet specifies the upper four bits are reserved.
> Testing on real hardware shows that these bits can indeed be nonzero.
> 
> Signed-off-by: Emil Lenngren <emil.lenngren@gmail.com>

Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>

> ---
>  drivers/mtd/nand/spi/macronix.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/spi/macronix.c b/drivers/mtd/nand/spi/macronix.c
> index 98f6b9c4b6..d16b57081c 100644
> --- a/drivers/mtd/nand/spi/macronix.c
> +++ b/drivers/mtd/nand/spi/macronix.c
> @@ -10,6 +10,7 @@
>  #include <linux/mtd/spinand.h>
>  
>  #define SPINAND_MFR_MACRONIX		0xC2
> +#define MACRONIX_ECCSR_MASK		0x0F
>  
>  static SPINAND_OP_VARIANTS(read_cache_variants,
>  		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
> @@ -55,7 +56,12 @@ static int mx35lf1ge4ab_get_eccsr(struct spinand_device *spinand, u8 *eccsr)
>  					  SPI_MEM_OP_DUMMY(1, 1),
>  					  SPI_MEM_OP_DATA_IN(1, eccsr, 1));
>  
> -	return spi_mem_exec_op(spinand->spimem, &op);
> +	int ret = spi_mem_exec_op(spinand->spimem, &op);
> +	if (ret)
> +		return ret;
> +
> +	*eccsr &= MACRONIX_ECCSR_MASK;
> +	return 0;
>  }
>  
>  static int mx35lf1ge4ab_ecc_get_status(struct spinand_device *spinand,