linux-kernel - Re: Possible nvme regression in 6.4.11

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Date:   Wed, 16 Aug 2023 21:30:34 -0400
From:   Genes Lists <lists@...ience.com>
To:     Keith Busch <kbusch@...nel.org>
Cc:     linux-kernel@...r.kernel.org, axboe@...nel.dk, sagi@...mberg.me,
        linux-nvme@...ts.infradead.org, hch@....de
Subject: Re: Possible nvme regression in 6.4.11

On 8/16/23 17:04, Keith Busch wrote:
...
> It sounds like you can recreate this. Since .10 worked and .11 doesn't,
> could you bisect the git commits? It looks like it will take 7 steps
> between those two versions.
> 
> I don't think there are any nvme specific patches that could contribute
> to what you're seeing, it's more likely some lower level platform patch
> if a kernel change really did cause the regression. None of the recent
> commits really stood out to me, so bisect is what I'd recommend.

Thank you

Bisect done - This is result:

----------------------------------------------------------------
69304c8d285b77c9a56d68f5ddb2558f27abf406 is the first bad commit
commit 69304c8d285b77c9a56d68f5ddb2558f27abf406
Author: Ricky WU <ricky_wu@...ltek.com>
Date:   Tue Jul 25 09:10:54 2023 +0000

     misc: rtsx: judge ASPM Mode to set PETXCFG Reg

     commit 101bd907b4244a726980ee67f95ed9cafab6ff7a upstream.

     ASPM Mode is ASPM_MODE_CFG need to judge the value of clkreq_0
     to set HIGH or LOW, if the ASPM Mode is ASPM_MODE_REG
     always set to HIGH during the initialization.

     Cc: stable@...r.kernel.org
     Signed-off-by: Ricky Wu <ricky_wu@...ltek.com>
     Link: 
https://lore.kernel.org/r/52906c6836374c8cb068225954c5543a@realtek.com
     Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

  drivers/misc/cardreader/rts5227.c  |  2 +-
  drivers/misc/cardreader/rts5228.c  | 18 ------------------
  drivers/misc/cardreader/rts5249.c  |  3 +--
  drivers/misc/cardreader/rts5260.c  | 18 ------------------
  drivers/misc/cardreader/rts5261.c  | 18 ------------------
  drivers/misc/cardreader/rtsx_pcr.c |  5 ++++-
  6 files changed, 6 insertions(+), 58 deletions(-)

------------------------------------------------------

And the machine does have this hardware:

03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A 
PCI Express Card Reader (rev 01)
         Subsystem: Dell RTS525A PCI Express Card Reader
         Physical Slot: 1
         Flags: bus master, fast devsel, latency 0, IRQ 141
         Memory at ed100000 (32-bit, non-prefetchable) [size=4K]
         Capabilities: [80] Power Management version 3
         Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit+
         Capabilities: [b0] Express Endpoint, MSI 00
         Kernel driver in use: rtsx_pci
         Kernel modules: rtsx_pci