Message-Id: <DC3TO97G0RMI.3KKUONOCLJHFB@cknow.org>
Date: Sat, 16 Aug 2025 13:40:44 +0200
From: "Diederik de Haas" <didi.debian@...ow.org>
To: <linux-nvme@...ts.infradead.org>
Cc: <linux-kernel@...r.kernel.org>, "Diederik de Haas"
 <didi.debian@...ow.org>
Subject: [BUG report] kernel warnings with Samsung 970 EVO 2TB SSD

Hi,

I have a Samsung 970 EVO 2TB SSD and I see these kernel warnings:

root@...opi-r5s:~# uname -a
Linux nanopi-r5s 6.16-arm64-cknow #1 SMP PREEMPT Debian 6.16-1 (2025-07-28) aarch64 GNU/Linux
root@...opi-r5s:~# dmesg --level 0,1,2
root@...opi-r5s:~# dmesg --level 3
root@...opi-r5s:~# dmesg --level 4
[    2.410231] dw-apb-uart fe660000.serial: forbid DMA for kernel console
[    5.234812] gpio gpiochip0: Static allocation of GPIO base is deprecated, use dynamic allocation.
[    5.242112] gpio gpiochip1: Static allocation of GPIO base is deprecated, use dynamic allocation.
[    5.246222] gpio gpiochip2: Static allocation of GPIO base is deprecated, use dynamic allocation.
[    5.252811] gpio gpiochip3: Static allocation of GPIO base is deprecated, use dynamic allocation.
[    5.265791] gpio gpiochip4: Static allocation of GPIO base is deprecated, use dynamic allocation.
[    5.741901] r8169 0000:01:00.0: can't read MAC address, setting random one
[    5.806644] pci 0001:10:00.0: Primary bus is hard wired to 0
[    5.849952] r8169 0001:11:00.0: can't read MAC address, setting random one
[    6.017270] pci 0002:20:00.0: Primary bus is hard wired to 0
[    6.393688] nvme nvme0: missing or invalid SUBNQN field.
[   21.484306] nvme nvme0: using unchecked data buffer
root@...opi-r5s:~# dmesg | grep nvme
[    6.386187] nvme nvme0: pci function 0002:21:00.0
[    6.386697] nvme 0002:21:00.0: enabling device (0000 -> 0002)
[    6.393688] nvme nvme0: missing or invalid SUBNQN field.
[    6.397901] nvme nvme0: D3 entry latency set to 8 seconds
[    6.428168] nvme nvme0: 4/0/0 default/read/poll queues
[    6.465173]  nvme0n1: p1
[   12.522314] systemd[1]: Starting modprobe@...e_fabrics.service - Load Kernel Module nvme_fabrics...
[   12.973871] systemd[1]: modprobe@...e_fabrics.service: Deactivated successfully.
[   12.977051] systemd[1]: Finished modprobe@...e_fabrics.service - Load Kernel Module nvme_fabrics.
[   21.484306] nvme nvme0: using unchecked data buffer

Before I put this SSD into my FriendlyELEC NanoPi R5S (rk3568; arm64)
I had it in my main PC (AMD Ryzen 1800X; amd64) where I had these
warnings as well, so it seems directly connected to the drive, not the
device it's plugged into.

I wonder if something can be done to fix those warnings.
I'm not aware of these warnings causing actual problems, but I haven't
'really' used it thus far (mostly to store some media files), but I want
to use my NanoPi R5S as my server (with f.e. my git repos), so I want to
be extra sure my data won't be at risk. And I don't like ignoring kernel
warnings; I assume they're warnings for a reason.

Some more data about the drive:

root@...opi-r5s:~# nvme list
Node                  Generic               SN                   Model                                    Namespace  Usage                      Format           FW Rev
--------------------- --------------------- -------------------- ---------------------------------------- ---------- -------------------------- ---------------- --------
/dev/nvme0n1          /dev/ng0n1            xxxxxxxxxxxxxxx      Samsung SSD 970 EVO Plus 2TB             0x1        534.51  GB /   2.00  TB    512   B +  0 B   2B2QEXM7

root@...opi-r5s:~# nvme get-feature /dev/nvme0 -f 3
get-feature:0x03 (LBA Range Type): NVMe status: Invalid Namespace or Format: The namespace or the format of that namespace is invalid(0x200b)

I don't know if it would/can be risky to share the Serial Number, so I
blanked that out, but I can provide that if that would be helpful.

root@...opi-r5s:~# lspci -v -s 0002:21:00.0
0002:21:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983 (prog-if 02 [NVM Express])
        Subsystem: Samsung Electronics Co Ltd SSD 970 EVO/PRO
        Flags: bus master, fast devsel, latency 0, IRQ 75
        Memory at f0200000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: [40] Power Management version 3
        Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [70] Express Endpoint, IntMsgNum 0
        Capabilities: [b0] MSI-X: Enable+ Count=33 Masked-
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [148] Device Serial Number 00-00-00-00-00-00-00-00
        Capabilities: [158] Power Budgeting <?>
        Capabilities: [168] Secondary PCI Express
        Capabilities: [188] Latency Tolerance Reporting
        Capabilities: [190] L1 PM Substates
        Kernel driver in use: nvme
        Kernel modules: nvme

But I did not change the Device Serial Number from lspci.
AFAIK I have the latest firmware (checked with fwupd).

Happy to provide additional data, but as I don't know what would be
useful, I figured I'll leave it up to the experts to ask for it.

Cheers,
  Diederik

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