[PATCH v2] mtd: tests: nandbiterrs: Fix read_page return value

[Boris Brezillon]

On Tue,  9 Jan 2018 10:47:02 +0100
Sascha Hauer <s.hauer at pengutronix.de> wrote:

> The number of corrected bitflips is not correctly reported by
> the test until the bitflip threshold is reached.
> 
> read_page() shall return the number of corrected bitflips, but
> mtd_read() returns 0 or a negative error, so we can't forward
> its return value. In the absence of an error we always have
> calculate the number of bitflips ourselves.
> 
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>

I'll apply this patch, but you should really start using the userspace
tests provided by mtd-utils, because I still plan to remove the
in-kernel test modules at some point ;-).

> ---
>  drivers/mtd/tests/nandbiterrs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/tests/nandbiterrs.c b/drivers/mtd/tests/nandbiterrs.c
> index 5f03b8c885a9..cde19c99e77b 100644
> --- a/drivers/mtd/tests/nandbiterrs.c
> +++ b/drivers/mtd/tests/nandbiterrs.c
> @@ -151,7 +151,7 @@ static int read_page(int log)
>  	memcpy(&oldstats, &mtd->ecc_stats, sizeof(oldstats));
>  
>  	err = mtd_read(mtd, offset, mtd->writesize, &read, rbuffer);
> -	if (err == -EUCLEAN)
> +	if (!err || err == -EUCLEAN)
>  		err = mtd->ecc_stats.corrected - oldstats.corrected;
>  
>  	if (err < 0 || read != mtd->writesize) {