[PATCH] mtd: tests: nandbiterrs: Fix read_page return value
Boris Brezillon
boris.brezillon at free-electrons.com
Tue Jan 9 01:31:12 PST 2018
On Tue, 9 Jan 2018 10:09:38 +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>
> ---
> drivers/mtd/tests/nandbiterrs.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mtd/tests/nandbiterrs.c b/drivers/mtd/tests/nandbiterrs.c
> index 5f03b8c885a9..11e39ab4a810 100644
> --- a/drivers/mtd/tests/nandbiterrs.c
> +++ b/drivers/mtd/tests/nandbiterrs.c
> @@ -152,15 +152,16 @@ static int read_page(int log)
>
> err = mtd_read(mtd, offset, mtd->writesize, &read, rbuffer);
> if (err == -EUCLEAN)
Why not just replacing the above test by
if (!err || err == -EUCLEAN)
> - err = mtd->ecc_stats.corrected - oldstats.corrected;
> + err = 0;
>
> if (err < 0 || read != mtd->writesize) {
> pr_err("error: read failed at %#llx\n", (long long)offset);
> if (err >= 0)
> err = -EIO;
> + return err;
> }
>
> - return err;
> + return mtd->ecc_stats.corrected - oldstats.corrected;
> }
>
> /* Verifies rbuffer against random sequence */
More information about the linux-mtd
mailing list