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* [PATCH] mmc: core: disable TRIM on Micron MTFC4GACAJCN-1M
@ 2023-05-30 21:32 Robert Marko
  2023-05-31  5:30 ` Avri Altman
  2023-06-08 22:18 ` Ulf Hansson
  0 siblings, 2 replies; 5+ messages in thread
From: Robert Marko @ 2023-05-30 21:32 UTC (permalink / raw)
  To: ulf.hansson, windhl, avri.altman, linux-mmc, linux-kernel; +Cc: Robert Marko

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.

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 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


^ permalink raw reply related	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2023-06-19 19:37 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-05-30 21:32 [PATCH] mmc: core: disable TRIM on Micron MTFC4GACAJCN-1M Robert Marko
2023-05-31  5:30 ` Avri Altman
2023-06-08 22:18 ` Ulf Hansson
2023-06-19 11:43   ` Ulf Hansson
2023-06-19 19:36     ` Robert Marko

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