[PATCH v4 3/4] mtd: add ECC error accounting for each read request

[Miquel Raynal]

On Wed, 2022-06-29 at 12:57:36 UTC, =?utf-8?b?TWljaGHFgiBLxJlwaWXFhA==?= wrote:
> Extend struct mtd_req_stats with two new fields holding the number of
> corrected bitflips and uncorrectable errors detected during a read
> operation.  This is a prerequisite for ultimately passing those counters
> to user space, where they can be useful to applications for making
> better-informed choices about moving data around.
> 
> Unlike 'max_bitflips' (which is set - in a common code path - to the
> return value of a function called while the MTD device's mutex is held),
> these counters have to be maintained in each MTD driver which defines
> the '_read_oob' callback because the statistics need to be calculated
> while the MTD device's mutex is held.
> 
> Suggested-by: Boris Brezillon <boris.brezillon at collabora.com>
> Signed-off-by: Michał Kępień <kernel at kempniu.pl>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/next, thanks.

Miquel