PCI: dwc: Proceed with system suspend even if the endpoint doesn't respond with PME_TO_Ack message

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PCIe spec r7.0, sec 5.3.3.2.1, recommends proceeding with L2/L3 sequence
even if one or devices do not respond with PME_TO_Ack message after 10ms
timeout.

So just print a warning if the timeout happens and proceed with the system
suspend.

Reported-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-HDK
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260217113142.9140-1-manivannan.sadhasivam@oss.qualcomm.com

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Manivannan Sadhasivam 2026-02-17 17:01:42 +05:30 • committed by Manivannan Sadhasivam

parent 6de23f81a5

commit eed3907754

1 changed files with 7 additions and 3 deletions

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drivers/pci/controller/dwc/pcie-designware-host.c

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