linux-kernel - AER: Uncorrected (Non-Fatal) error received: 0000:00:00.0

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Message-ID: <44836e54-e200-7a1d-30b2-47e90d056951@molgen.mpg.de>
Date:   Fri, 7 Feb 2020 17:24:33 +0100
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     linux-pci@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mario Limonciello <mario.limonciello@...l.com>
Subject: AER: Uncorrected (Non-Fatal) error received: 0000:00:00.0

Dear Linux folks,


On the Dell OptiPlex 5055 with AMD Ryzen 5 PRO 1500 and UEFI firmware
1.1.20, setting ASPM from *Disabled* to *Auto* in the firmware menu,
Linux 5.5 continuously logs the messages below.

```
pcieport 0000:00:01.1: AER: Uncorrected (Non-Fatal) error received: 0000:00:00.0
pcieport 0000:00:01.1: AER: PCIe Bus Error: severity=Uncorrected (Non-Fatal), type=Transaction Layer, (Requester ID)
pcieport 0000:00:01.1: AER:   device [1022:1453] error status/mask=00100000/04400000
pcieport 0000:00:01.1: AER:    [20] UnsupReq               (First)  
pcieport 0000:00:01.1: AER:   TLP Header: 34000000 01000010 00000000 80008000
pcieport 0000:00:01.1: AER: Device recovery successful
pcieport 0000:00:01.1: AER: Uncorrected (Non-Fatal) error received: 0000:00:00.0
pcieport 0000:00:01.1: AER: PCIe Bus Error: severity=Uncorrected (Non-Fatal), type=Transaction Layer, (Requester ID)
pcieport 0000:00:01.1: AER:   device [1022:1453] error status/mask=00100000/04400000
pcieport 0000:00:01.1: AER:    [20] UnsupReq               (First)  
pcieport 0000:00:01.1: AER:   TLP Header: 34000000 01000010 00000000 00000000
pcieport 0000:00:01.1: AER: Device recovery successful
pcieport 0000:00:01.1: AER: Uncorrected (Non-Fatal) error received: 0000:00:00.0
pcieport 0000:00:01.1: AER: can't find device of ID0000
```

Is that a firmware bug, or can this be worked around in the Linux kernel?


Kind regards,

Paul

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