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From: "Oliver O'Halloran" <oohall@gmail.com>
Date: Mon, 4 Nov 2019 10:38:23 +1100
Message-ID: <CAOSf1CFn7F_3gLk4sCetDd3JGUiTv50=KSqQuicpPkcRZPVKNQ@mail.gmail.com>
Subject: Re: PROBLEM: PCIe Bus Error atleast
To: Jeffrin Thalakkottoor <jeffrin@rajagiritech.edu.in>
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Cc: Sam Bobroff <sbobroff@linux.ibm.com>, linux-pci@vger.kernel.org,
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On Sat, Nov 2, 2019 at 5:46 AM Jeffrin Thalakkottoor
<jeffrin@rajagiritech.edu.in> wrote:
>
> hello ,
>
> i found a error message  as the output of "sudo dmesg -l err"
> i have attached related to that in this email.
> i  think i found this in 5.3.8 kernel

Use "uname -a" to get the current kernel version, architecture.

> But i think when i tried again today i could not reproduce it

That's unfortunate, but it might have just been a transient problem.
The log has a pile of these AER errors:

[  283.723848] pcieport 0000:00:1c.5: AER: PCIe Bus Error:
severity=Corrected, type=Data Link Layer, (Transmitter ID)
[  283.723855] pcieport 0000:00:1c.5: AER:   device [8086:9d15] error
status/mask=00001000/00002000
[  283.723859] pcieport 0000:00:1c.5: AER:    [12] Timeout

Which looks like a root port is getting a timeouts while trying to
talk to its downstream device. It's hard to say anything more without
knowing what the downstream device is, or what the system is. If this
is a laptop it might be due to buggy power management, but it might
just be flakey hardware.

Can you provide the full dmesg and the output of lspci -vv?

Oliver