target/linux/ipq807x/patches-6.1/0133-mmc-core-disable-TRIM-on-Kingston-EMMC04G-M627.patch

   1 From 26c97b6fb7d291f55e0e4a410d266d1355118ed9 Mon Sep 17 00:00:00 2001
   2 From: Robert Marko <robimarko@gmail.com>
   3 Date: Wed, 31 May 2023 20:21:26 +0200
   4 Subject: [PATCH] mmc: core: disable TRIM on Kingston EMMC04G-M627
   5
   6 It seems that Kingston EMMC04G-M627 despite advertising TRIM support does
   7 not work when the core is trying to use REQ_OP_WRITE_ZEROES.
   8
   9 We are seeing I/O errors in OpenWrt under 6.1 on Zyxel NBG7815 that we did
  10 not previously have and tracked it down to REQ_OP_WRITE_ZEROES.
  11
  12 Trying to use fstrim seems to also throw errors like:
  13 [93010.835112] I/O error, dev loop0, sector 16902 op 0x3:(DISCARD) flags 0x800 phys_seg 1 prio class 2
  14
  15 Disabling TRIM makes the error go away, so lets add a quirk for this eMMC
  16 to disable TRIM.
  17
  18 Signed-off-by: Robert Marko <robimarko@gmail.com>
  19 ---
  20  drivers/mmc/core/quirks.h | 7 +++++++
  21  1 file changed, 7 insertions(+)
  22
  23 --- a/drivers/mmc/core/quirks.h
  24 +++ b/drivers/mmc/core/quirks.h
  25 @@ -108,6 +108,13 @@ static const struct mmc_fixup __maybe_un
  26                   MMC_QUIRK_TRIM_BROKEN),
  27
  28         /*
  29 +        * Kingston EMMC04G-M627 advertises TRIM but it does not seems to
  30 +        * support being used to offload WRITE_ZEROES.
  31 +        */
  32 +       MMC_FIXUP("M62704", CID_MANFID_KINGSTON, 0x0100, add_quirk_mmc,
  33 +                 MMC_QUIRK_TRIM_BROKEN),
  34 +
  35 +       /*
  36          * Some SD cards reports discard support while they don't
  37          */
  38         MMC_FIXUP(CID_NAME_ANY, CID_MANFID_SANDISK_SD, 0x5344, add_quirk_sd,