openwrt/target/linux/layerscape/patches-4.4/0053-PCI-designware-Make-config-accessor-override-checkin.patch

From 6882f9eef932e6f5cc3c57115e3d7d4b5bc19662 Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <bhelgaas@google.com>
Date: Tue, 5 Jan 2016 15:56:30 -0600
Subject: [PATCH 53/70] PCI: designware: Make config accessor override
 checking symmetric

Drivers based on the DesignWare core can override the config read accessors
by supplying rd_own_conf() and rd_other_conf() function pointers.
dw_pcie_rd_conf() calls dw_pcie_rd_own_conf() (for accesses to the root
bus) or dw_pcie_rd_other_conf():

  dw_pcie_rd_conf
    dw_pcie_rd_own_conf                # if on root bus
    dw_pcie_rd_other_conf              # if not on root bus

Previously we checked for rd_other_conf() directly in dw_pcie_rd_conf(),
but we checked for rd_own_conf() in dw_pcie_rd_own_conf().

Check for rd_other_conf() in dw_pcie_rd_other_conf() to make this symmetric
with the rd_own_conf() checking, and similarly for the write path.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Pratyush Anand <pratyush.anand@gmail.com>
---
 drivers/pci/host/pcie-designware.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -571,6 +571,9 @@ static int dw_pcie_rd_other_conf(struct
 	u64 cpu_addr;
 	void __iomem *va_cfg_base;
 
+	if (pp->ops->rd_other_conf)
+		return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
+
 	busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
 		 PCIE_ATU_FUNC(PCI_FUNC(devfn));
 
@@ -605,6 +608,9 @@ static int dw_pcie_wr_other_conf(struct
 	u64 cpu_addr;
 	void __iomem *va_cfg_base;
 
+	if (pp->ops->wr_other_conf)
+		return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
+
 	busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
 		 PCIE_ATU_FUNC(PCI_FUNC(devfn));
 
@@ -667,9 +673,6 @@ static int dw_pcie_rd_conf(struct pci_bu
 	if (bus->number == pp->root_bus_nr)
 		return dw_pcie_rd_own_conf(pp, where, size, val);
 
-	if (pp->ops->rd_other_conf)
-		return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
-
 	return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val);
 }
 
@@ -684,9 +687,6 @@ static int dw_pcie_wr_conf(struct pci_bu
 	if (bus->number == pp->root_bus_nr)
 		return dw_pcie_wr_own_conf(pp, where, size, val);
 
-	if (pp->ops->wr_other_conf)
-		return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
-
 	return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val);
 }