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BACKPORT: PCI: dwc: Proceed with system suspend even if the endpoint doesn't respond with PME_TO_Ack message #1210

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Hariharan Sreedhar (hariharan-sree) wants to merge 1 commit into
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BACKPORT: PCI: dwc: Proceed with system suspend even if the endpoint doesn't respond with PME_TO_Ack message #1210

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10 changes: 7 additions & 3 deletions drivers/pci/controller/dwc/pcie-designware-host.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1201,9 +1201,13 @@ int dw_pcie_suspend_noirq(struct dw_pcie *pci)
PCIE_PME_TO_L2_TIMEOUT_US/10,
PCIE_PME_TO_L2_TIMEOUT_US, false, pci);
if (ret) {
/* Only log message when LTSSM isn't in DETECT or POLL */
dev_err(pci->dev, "Timeout waiting for L2 entry! LTSSM: 0x%x\n", val);
return ret;
/*
* Failure is non-fatal since spec r7.0, sec 5.3.3.2.1,
* recommends proceeding with L2/L3 sequence even if one or more
* devices do not respond with PME_TO_Ack after 10ms timeout.
*/
dev_warn(pci->dev, "Timeout waiting for L2 entry! LTSSM: 0x%x\n", val);
ret = 0;
}

/*
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