lkml.org 
[lkml]   [2023]   [Jun]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] mmc: core: disable TRIM on Kingston EMMC04G-M627
Date
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>
---
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 77caa0c903f8..8decb788a3db 100644
--- a/drivers/mmc/core/quirks.h
+++ b/drivers/mmc/core/quirks.h
@@ -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
*/
--
2.41.0
\
 
 \ /
  Last update: 2023-06-19 21:37    [W:0.016 / U:0.804 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site