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PCI: dwc: Always stop link in the dw_pcie_suspend_noirq

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On the i.MX8QM, PCIe link can't be re-established again in
dw_pcie_resume_noirq(), if the LTSSM_EN bit is not cleared
properly in dw_pcie_suspend_noirq().

So, add dw_pcie_stop_link() to dw_pcie_suspend_noirq() to fix
this issue and to align the suspend/resume functions since there
is dw_pcie_start_link() in dw_pcie_resume_noirq() already.

Fixes: 4774faf854 ("PCI: dwc: Implement generic suspend/resume functionality")
Link: https://lore.kernel.org/r/20241210081557.163555-2-hongxing.zhu@nxp.com
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
Richard Zhu
2024-12-10 16:15:56 +08:00
committed by Bjorn Helgaas
parent ec9fd499b9
commit 86a016e278
1 changed files with 1 additions and 0 deletions
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1
drivers/pci/controller/dwc/pcie-designware-host.c
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@@ -952,6 +952,7 @@ int dw_pcie_suspend_noirq(struct dw_pcie *pci)
return ret;
}
dw_pcie_stop_link(pci);
if (pci->pp.ops->deinit)
pci->pp.ops->deinit(&pci->pp);