powerpc/fsl_pci: Fix pci stack build bug with FRAME_WARN

Fix this:

  CC      arch/powerpc/sysdev/fsl_pci.o
arch/powerpc/sysdev/fsl_pci.c: In function 'fsl_pcie_check_link':
arch/powerpc/sysdev/fsl_pci.c:91:1: error: the frame size of 1360 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]

when configuring FRAME_WARN, by refactoring indirect_read_config()
to take hose and bus number instead of the 1344-byte struct pci_bus.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>

2 files changed, 21 insertions, 15 deletions

diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 6455c1eada1a..7cc215e86d82 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -68,13 +68,10 @@ static int fsl_pcie_check_link(struct pci_controller *hose)
         u32 val = 0;
 
         if (hose->indirect_type & PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK) {
-                if (hose->ops->read == fsl_indirect_read_config) {
-                        struct pci_bus bus;
-                        bus.number = hose->first_busno;
-                        bus.sysdata = hose;
-                        bus.ops = hose->ops;
-                        indirect_read_config(&bus, 0, PCIE_LTSSM, 4, &val);
-                } else
+                if (hose->ops->read == fsl_indirect_read_config)
+                        __indirect_read_config(hose, hose->first_busno, 0,
+                                               PCIE_LTSSM, 4, &val);
+                else
                         early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val);
                 if (val < PCIE_LTSSM_L0)
                         return 1;
diff --git a/arch/powerpc/sysdev/indirect_pci.c b/arch/powerpc/sysdev/indirect_pci.c
index 1f6c570d66d4..692de9dbc680 100644
--- a/arch/powerpc/sysdev/indirect_pci.c
+++ b/arch/powerpc/sysdev/indirect_pci.c
@@ -20,31 +20,31 @@
 #include <asm/pci-bridge.h>
 #include <asm/machdep.h>
 
-int indirect_read_config(struct pci_bus *bus, unsigned int devfn,
-                         int offset, int len, u32 *val)
+int __indirect_read_config(struct pci_controller *hose,
+                           unsigned char bus_number, unsigned int devfn,
+                           int offset, int len, u32 *val)
 {
-        struct pci_controller *hose = pci_bus_to_host(bus);
         volatile void __iomem *cfg_data;
         u8 cfg_type = 0;
         u32 bus_no, reg;
 
         if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK) {
-                if (bus->number != hose->first_busno)
+                if (bus_number != hose->first_busno)
                         return PCIBIOS_DEVICE_NOT_FOUND;
                 if (devfn != 0)
                         return PCIBIOS_DEVICE_NOT_FOUND;
         }
 
         if (ppc_md.pci_exclude_device)
-                if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
+                if (ppc_md.pci_exclude_device(hose, bus_number, devfn))
                         return PCIBIOS_DEVICE_NOT_FOUND;
 
         if (hose->indirect_type & PPC_INDIRECT_TYPE_SET_CFG_TYPE)
-                if (bus->number != hose->first_busno)
+                if (bus_number != hose->first_busno)
                         cfg_type = 1;
 
-        bus_no = (bus->number == hose->first_busno) ?
-                        hose->self_busno : bus->number;
+        bus_no = (bus_number == hose->first_busno) ?
+                        hose->self_busno : bus_number;
 
         if (hose->indirect_type & PPC_INDIRECT_TYPE_EXT_REG)
                 reg = ((offset & 0xf00) << 16) | (offset & 0xfc);
@@ -77,6 +77,15 @@ int indirect_read_config(struct pci_bus *bus, unsigned int devfn,
         return PCIBIOS_SUCCESSFUL;
 }
 
+int indirect_read_config(struct pci_bus *bus, unsigned int devfn,
+                         int offset, int len, u32 *val)
+{
+        struct pci_controller *hose = pci_bus_to_host(bus);
+
+        return __indirect_read_config(hose, bus->number, devfn, offset, len,
+                                      val);
+}
+
 int indirect_write_config(struct pci_bus *bus, unsigned int devfn,
                           int offset, int len, u32 val)
 {