From: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
During system suspend, if the PCIe link is not up, then there is no need
to broadcast PME_Turn_Off message and wait for L2/L3 transition. So skip
them.
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
---
drivers/pci/controller/dwc/pcie-designware-host.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 372207c33a85..43d091128ef7 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -1161,6 +1161,9 @@ int dw_pcie_suspend_noirq(struct dw_pcie *pci)
u32 val;
int ret;
+ if (!dw_pcie_link_up(pci))
+ goto stop_link;
+
/*
* If L1SS is supported, then do not put the link into L2 as some
* devices such as NVMe expect low resume latency.
@@ -1194,6 +1197,7 @@ int dw_pcie_suspend_noirq(struct dw_pcie *pci)
*/
udelay(1);
+stop_link:
dw_pcie_stop_link(pci);
if (pci->pp.ops->deinit)
pci->pp.ops->deinit(&pci->pp);
--
2.48.1