Re: [PATCH v6 0/4] PCI: Add support for resetting the Root Ports in a platform specific way
From: Manivannan Sadhasivam <mani@kernel.org>
Date: 2025-07-24 05:30:16
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linux-arm-kernel, linux-arm-msm, linux-pci, linux-rockchip, lkml
On Fri, Jul 18, 2025 at 12:39:50PM GMT, Niklas Cassel wrote:
On Fri, Jul 18, 2025 at 12:28:44PM +0200, Niklas Cassel wrote:quoted
On Tue, Jul 15, 2025 at 07:51:03PM +0530, Manivannan Sadhasivam via B4 Relay wrote: 2) Testing link down reset: selftests before link down reset: # FAILED: 14 / 16 tests passed. ## On EP side: # echo 0 > /sys/kernel/config/pci_ep/controllers/a40000000.pcie-ep/start && \ sleep 0.1 && echo 1 > /sys/kernel/config/pci_ep/controllers/a40000000.pcie-ep/start [ 111.137162] rockchip-dw-pcie a40000000.pcie: PCIE_CLIENT_INTR_STATUS_MISC: 0x4 [ 111.137881] rockchip-dw-pcie a40000000.pcie: LTSSM_STATUS: 0x0 [ 111.138432] rockchip-dw-pcie a40000000.pcie: hot reset or link-down reset [ 111.139067] pcieport 0000:00:00.0: Recovering Root Port due to Link Down [ 111.139686] pci-endpoint-test 0000:01:00.0: AER: can't recover (no error_detected callback) [ 111.255407] rockchip-dw-pcie a40000000.pcie: PCIe Gen.3 x4 link up [ 111.256019] rockchip-dw-pcie a40000000.pcie: Root Port reset completed [ 111.383401] pcieport 0000:00:00.0: Root Port has been reset [ 111.384060] pcieport 0000:00:00.0: AER: device recovery failed [ 111.384582] rockchip-dw-pcie a40000000.pcie: PCIE_CLIENT_INTR_STATUS_MISC: 0x3 [ 111.385218] rockchip-dw-pcie a40000000.pcie: LTSSM_STATUS: 0x230011 [ 111.385771] rockchip-dw-pcie a40000000.pcie: Received Link up event. Starting enumeration! [ 111.390866] pcieport 0000:00:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring [ 111.391650] pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 01 Basically all tests timeout # FAILED: 1 / 16 tests passed. Which is the same as before this patch series.The above was with CONFIG_PCIEAER=y
This is kind of expected since the pci_endpoint_test driver doesn't have the AER err_handlers defined.
Wilfred suggested that I tried without this config set. However, doing so, I got the exact same result: # FAILED: 1 / 16 tests passed.
Interesting. Could you please share the dmesg log like above. - Mani -- மணிவண்ணன் சதாசிவம்