[PATCH v2] PCI: dwc: Fix MSI not work after resume

[Jisheng Zhang]

After we move dw_pcie_msi_init() into core -- dw_pcie_host_init(), the
MSI stops working after resume. Because dw_pcie_host_init() is only
called once during probe. To fix this issue, we move dw_pcie_msi_init()
to dw_pcie_setup_rc().

Fixes: 59fbab1ae40e ("PCI: dwc: Move dw_pcie_msi_init() into core")
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@xxxxxxxxxxxxx>
---

Since v1:
 - rebased on 5.11-rc1
 - add Fixes tag

 drivers/pci/controller/dwc/pcie-designware-host.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 8a84c005f32b..5240b5f0973d 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -423,7 +423,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	}
 
 	dw_pcie_setup_rc(pp);
-	dw_pcie_msi_init(pp);
 
 	if (!dw_pcie_link_up(pci) && pci->ops->start_link) {
 		ret = pci->ops->start_link(pci);
@@ -574,6 +573,8 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
 		}
 	}
 
+	dw_pcie_msi_init(pp);
+
 	/* Setup RC BARs */
 	dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0x00000004);
 	dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0x00000000);
-- 
2.30.0.rc2