Hi,
I notice a bug report on Bugzilla [1]. Quoting from it:
> We have an ASUS X555UQ laptop equipped with Intel i7-6500U CPU and Realtek RTL8723BE PCIe Wireless adapter.
>
> We tested it with kernel 6.6. System keeps showing AER error message flood, even hangs up, until rtl8723be's ASPM is disabled.
>
> kernel: pcieport 0000:00:1c.5: PCIe Bus Error: severity=Corrected, type=Physical Layer, (Receiver ID)
> kernel: pcieport 0000:00:1c.5: device [8086:9d15] error status/mask=00000001/00002000
> kernel: pcieport 0000:00:1c.5: [ 0] RxErr (First)
> kernel: pcieport 0000:00:1c.5: AER: Corrected error received: 0000:00:1c.5
> kernel: pcieport 0000:00:1c.5: AER: can't find device of ID00e5
> kernel: pcieport 0000:00:1c.5: AER: Corrected error received: 0000:00:1c.5
> kernel: pcieport 0000:00:1c.5: AER: can't find device of ID00e5
> kernel: pcieport 0000:00:1c.5: AER: Multiple Corrected error received: 0000:00:1c.5
> kernel: pcieport 0000:00:1c.5: AER: can't find device of ID00e5
>
> Here is the PCI tree:
> $ lspci -tv
> -[0000:00]-+-00.0 Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers
> +-02.0 Intel Corporation Skylake GT2 [HD Graphics 520]
> +-04.0 Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem
> +-14.0 Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller
> +-14.2 Intel Corporation Sunrise Point-LP Thermal subsystem
> +-15.0 Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0
> +-15.1 Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1
> +-16.0 Intel Corporation Sunrise Point-LP CSME HECI #1
> +-17.0 Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode]
> +-1c.0-[01]----00.0 NVIDIA Corporation GM108M [GeForce 940MX]
> +-1c.4-[02]----00.0 Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
> +-1c.5-[03]----00.0 Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter
> +-1f.0 Intel Corporation Sunrise Point-LP LPC Controller
> +-1f.2 Intel Corporation Sunrise Point-LP PMC
> +-1f.3 Intel Corporation Sunrise Point-LP HD Audio
> \-1f.4 Intel Corporation Sunrise Point-LP SMBus
And then the reporter found that it was ASPM bug:
> Notice a long time ago discussion mail: Dmesg filled with "AER: Corrected error received" [1]
>
> So, I force write 1 to clear Receiver Error Status bit of Correctable Error Status Register, like
>
> diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> index 9c8fd69ae5ad..39faedd2ec8e 100644
> --- a/drivers/pci/pcie/aer.c
> +++ b/drivers/pci/pcie/aer.c
> @@ -1141,8 +1160,9 @@ static void aer_isr_one_error(struct aer_rpc *rpc,
> e_info.multi_error_valid = 0;
> aer_print_port_info(pdev, &e_info);
>
> - if (find_source_device(pdev, &e_info))
> - aer_process_err_devices(&e_info);
> + //if (find_source_device(pdev, &e_info))
> + // aer_process_err_devices(&e_info);
> + pci_write_config_dword(pdev, pdev->aer_cap + PCI_ERR_COR_STATUS, 0x1);
> }
>
> if (e_src->status & PCI_ERR_ROOT_UNCOR_RCV) {
>
> Then, system should clear the error right away. However, system still get the AER flood ...
>
> Seems that we still have to disable rtl8723be's ASPM.
See Bugzilla for the full thread and attached full kernel logs.
Thanks.
[1]: https://bugzilla.kernel.org/show_bug.cgi?id=218127
--
An old man doll... just what I always wanted! - Clara
