+ Luca (Bean was added by Avri in another thread)
On Tue, 30 May 2023 at 23:33, Robert Marko <robimarko@xxxxxxxxx> wrote:
>
> It seems that Micron MTFC4GACAJCN-1M despite advertising TRIM support does
> not work when the core is trying to use REQ_OP_WRITE_ZEROES.
>
> We are seeing the following errors in OpenWrt under 6.1 on Qnap Qhora 301W
> that we did not previously have and tracked it down to REQ_OP_WRITE_ZEROES:
> [ 18.085950] I/O error, dev loop0, sector 596 op 0x9:(WRITE_ZEROES) flags 0x800 phys_seg 0 prio class 2
>
> Disabling TRIM makes the error go away, so lets add a quirk for this eMMC
> to disable TRIM.
Let's leave this another week or so, to allow Micron folkz to confirm
before applying.
>
> Signed-off-by: Robert Marko <robimarko@xxxxxxxxx>
Kind regards
Uffe
> ---
> drivers/mmc/core/quirks.h | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/mmc/core/quirks.h b/drivers/mmc/core/quirks.h
> index 29b9497936df..77caa0c903f8 100644
> --- a/drivers/mmc/core/quirks.h
> +++ b/drivers/mmc/core/quirks.h
> @@ -100,6 +100,13 @@ static const struct mmc_fixup __maybe_unused mmc_blk_fixups[] = {
> MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
> MMC_QUIRK_TRIM_BROKEN),
>
> + /*
> + * Micron MTFC4GACAJCN-1M advertises TRIM but it does not seems to
> + * support being used to offload WRITE_ZEROES.
> + */
> + MMC_FIXUP("Q2J54A", CID_MANFID_MICRON, 0x014e, add_quirk_mmc,
> + MMC_QUIRK_TRIM_BROKEN),
> +
> /*
> * Some SD cards reports discard support while they don't
> */
> --
> 2.40.1
>
