Commit f1738a1f authored by Robert Marko's avatar Robert Marko Committed by Ulf Hansson
Browse files

mmc: core: disable TRIM on Kingston EMMC04G-M627 



It seems that Kingston EMMC04G-M627 despite advertising TRIM support does
not work when the core is trying to use REQ_OP_WRITE_ZEROES.

We are seeing I/O errors in OpenWrt under 6.1 on Zyxel NBG7815 that we did
not previously have and tracked it down to REQ_OP_WRITE_ZEROES.

Trying to use fstrim seems to also throw errors like:
[93010.835112] I/O error, dev loop0, sector 16902 op 0x3:(DISCARD) flags 0x800 phys_seg 1 prio class 2

Disabling TRIM makes the error go away, so lets add a quirk for this eMMC
to disable TRIM.

Signed-off-by: default avatarRobert Marko <robimarko@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230619193621.437358-1-robimarko@gmail.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent b5c3eb38

drivers/mmc/core/quirks.h

+7 −0
Original line number Diff line number Diff line
@@ -107,6 +107,13 @@ static const struct mmc_fixup __maybe_unused mmc_blk_fixups[] = { 
	MMC_FIXUP("Q2J54A", CID_MANFID_MICRON, 0x014e, add_quirk_mmc,

		  MMC_QUIRK_TRIM_BROKEN),



	/*

	 * Kingston EMMC04G-M627 advertises TRIM but it does not seems to

	 * support being used to offload WRITE_ZEROES.

	 */

	MMC_FIXUP("M62704", CID_MANFID_KINGSTON, 0x0100, add_quirk_mmc,

		  MMC_QUIRK_TRIM_BROKEN),



	/*

	 * Some SD cards reports discard support while they don't

	 */