[PATCH 6.4 726/800] mmc: core: disable TRIM on Kingston EMMC04G-M627

Greg Kroah-Hartman
2023-07-16T20:28:16Z

From: Robert Marko <robimarko@gmail.com>

commit f1738a1f816233e6dfc2407f24a31d596643fd90 upstream.

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: Robert Marko <robimarko@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230619193621.437358-1-robimarko@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/mmc/core/quirks.h | 7 +++++++
1 file changed, 7 insertions(+)

--- a/drivers/mmc/core/quirks.h
+++ b/drivers/mmc/core/quirks.h
@@ -110,6 +110,13 @@ static const struct mmc_fixup __maybe_un
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
*/
MMC_FIXUP(CID_NAME_ANY, CID_MANFID_SANDISK_SD, 0x5344, add_quirk_sd,