[PATCH v5 3/7] PCI: dwc: Add msi_host_deinit callback

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

Add msi_host_deinit() callback as a counterpart to msi_host_init(). It
will tear down MSI support in case host has to run host-specific ops.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/pci/controller/dwc/pcie-designware-host.c | 8 ++++++--
 drivers/pci/controller/dwc/pcie-designware.h      | 1 +
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 43d1d6116007..92dcaeabe2bf 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -424,7 +424,9 @@ int dw_pcie_host_init(struct pcie_port *pp)
 		return 0;
 
 err_free_msi:
-	if (pp->has_msi_ctrl)
+	if (pp->ops->msi_host_deinit)
+		pp->ops->msi_host_deinit(pp);
+	else if (pp->has_msi_ctrl)
 		dw_pcie_free_msi(pp);
 	return ret;
 }
@@ -434,7 +436,9 @@ void dw_pcie_host_deinit(struct pcie_port *pp)
 {
 	pci_stop_root_bus(pp->bridge->bus);
 	pci_remove_root_bus(pp->bridge->bus);
-	if (pp->has_msi_ctrl)
+	if (pp->ops->msi_host_deinit)
+		pp->ops->msi_host_deinit(pp);
+	else if (pp->has_msi_ctrl)
 		dw_pcie_free_msi(pp);
 }
 EXPORT_SYMBOL_GPL(dw_pcie_host_deinit);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 7d6e9b7576be..e1c48b71e0d2 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -175,6 +175,7 @@ enum dw_pcie_device_mode {
 struct dw_pcie_host_ops {
 	int (*host_init)(struct pcie_port *pp);
 	int (*msi_host_init)(struct pcie_port *pp);
+	void (*msi_host_deinit)(struct pcie_port *pp);
 };
 
 struct pcie_port {
-- 
2.35.1