| Message ID | 1727243317-15729-3-git-send-email-hongxing.zhu@nxp.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Krzysztof Wilczyński |
| Headers | show |
| Series | Bug fixes when dwc generic suspend/resume functions are used | expand |
On Wed, Sep 25, 2024 at 01:48:37PM +0800, Richard Zhu wrote: > On 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(). > > Add dw_pcie_stop_link() into dw_pcie_suspend_noirq() to fix this issue and > keep symmetric in suspend/resume function since there is > dw_pcie_start_link() in dw_pcie_resume_noirq(). > > Fixes: 4774faf854f5 ("PCI: dwc: Implement generic suspend/resume functionality") > Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> Reviewed-by: Frank Li <Frank.Li@nxp.com> > --- > drivers/pci/controller/dwc/pcie-designware-host.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c > index cb8c3c2bcc79..9ca33895456f 100644 > --- a/drivers/pci/controller/dwc/pcie-designware-host.c > +++ b/drivers/pci/controller/dwc/pcie-designware-host.c > @@ -952,6 +952,7 @@ int dw_pcie_suspend_noirq(struct dw_pcie *pci) > } > } > > + dw_pcie_stop_link(pci); > if (pci->pp.ops->deinit) > pci->pp.ops->deinit(&pci->pp); > > -- > 2.37.1 >
In subject, s/Do/Always On Wed, Sep 25, 2024 at 01:48:37PM +0800, Richard Zhu wrote: > On 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(). > > Add dw_pcie_stop_link() into dw_pcie_suspend_noirq() to fix this issue and > keep symmetric in suspend/resume function since there is > dw_pcie_start_link() in dw_pcie_resume_noirq(). > > Fixes: 4774faf854f5 ("PCI: dwc: Implement generic suspend/resume functionality") > Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> - Mani > --- > drivers/pci/controller/dwc/pcie-designware-host.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c > index cb8c3c2bcc79..9ca33895456f 100644 > --- a/drivers/pci/controller/dwc/pcie-designware-host.c > +++ b/drivers/pci/controller/dwc/pcie-designware-host.c > @@ -952,6 +952,7 @@ int dw_pcie_suspend_noirq(struct dw_pcie *pci) > } > } > > + dw_pcie_stop_link(pci); > if (pci->pp.ops->deinit) > pci->pp.ops->deinit(&pci->pp); > > -- > 2.37.1 >
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index cb8c3c2bcc79..9ca33895456f 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -952,6 +952,7 @@ int dw_pcie_suspend_noirq(struct dw_pcie *pci) } } + dw_pcie_stop_link(pci); if (pci->pp.ops->deinit) pci->pp.ops->deinit(&pci->pp);
On 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(). Add dw_pcie_stop_link() into dw_pcie_suspend_noirq() to fix this issue and keep symmetric in suspend/resume function since there is dw_pcie_start_link() in dw_pcie_resume_noirq(). Fixes: 4774faf854f5 ("PCI: dwc: Implement generic suspend/resume functionality") Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com> --- drivers/pci/controller/dwc/pcie-designware-host.c | 1 + 1 file changed, 1 insertion(+)