On Fri, Sep 24, 2021 at 10:33:14AM +0800, Yi Zhang wrote:

On Fri, Sep 24, 2021 at 12:58 AM Adam Manzanares
[off-list ref] wrote:

quoted

On Wed, Sep 22, 2021 at 09:56:47AM +0800, Yi Zhang wrote:

quoted

Hello

I found this issue during the nvme removal test, I did some debug code
found it was failed during nvme "CSTS – Controller Status" read, could
anyone help check if this is one HW or SW issue?

Hello Yi,

What is the nvme removal test? When I get access to the test I will run it on
the HW on my current machine to see what happens. I don't have the same SSD in
my current test system, but I will make sure I am able to run the test on the
same HW you are having issues with.

Hi Adam
Here is the steps, and the server I used is DELL R730xd and DELL R640,
feel free to let me know if you need more info, thanks.

# lspci | grep -i nvme
87:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd
NVMe SSD Controller SM981/PM981/PM983
#echo 1 >/sys/bus/pci/devices/0000\:87\:00.0/remove
#echo 1 >/sys/bus/pci/rescan

This is enough info for now. I can't reproduce the problem on the platform 
I am currently using. I will try to track down the same hw and fw that you 
are using, retest, and send an update.

Thanks
Yi

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