PCI: designware: Simplify control flow

Return values immediately when possible to simplify the control flow.

No functional change intended.  Folded in unused variable removal as
pointed out by Fabio Estevam <fabio.estevam@nxp.com>, Arnd Bergmann
<arnd@arndb.de>, and Thierry Reding <thierry.reding@gmail.com>.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Pratyush Anand <pratyush.anand@gmail.com>

diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 540f077..52e5673 100644 (file)
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -128,27 +128,19 @@ static inline void dw_pcie_writel_rc(struct pcie_port *pp, u32 val, u32 reg)
 static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
                               u32 *val)
 {
-       int ret;
-
        if (pp->ops->rd_own_conf)
-               ret = pp->ops->rd_own_conf(pp, where, size, val);
-       else
-               ret = dw_pcie_cfg_read(pp->dbi_base + where, size, val);
+               return pp->ops->rd_own_conf(pp, where, size, val);
 
-       return ret;
+       return dw_pcie_cfg_read(pp->dbi_base + where, size, val);
 }
 
 static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
                               u32 val)
 {
-       int ret;
-
        if (pp->ops->wr_own_conf)
-               ret = pp->ops->wr_own_conf(pp, where, size, val);
-       else
-               ret = dw_pcie_cfg_write(pp->dbi_base + where, size, val);
+               return pp->ops->wr_own_conf(pp, where, size, val);
 
-       return ret;
+       return dw_pcie_cfg_write(pp->dbi_base + where, size, val);
 }
 
 static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
@@ -384,8 +376,8 @@ int dw_pcie_link_up(struct pcie_port *pp)
 {
        if (pp->ops->link_up)
                return pp->ops->link_up(pp);
-       else
-               return 0;
+
+       return 0;
 }
 
 static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
@@ -659,46 +651,36 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
                        int size, u32 *val)
 {
        struct pcie_port *pp = bus->sysdata;
-       int ret;
 
        if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) {
                *val = 0xffffffff;
                return PCIBIOS_DEVICE_NOT_FOUND;
        }
 
-       if (bus->number != pp->root_bus_nr)
-               if (pp->ops->rd_other_conf)
-                       ret = pp->ops->rd_other_conf(pp, bus, devfn,
-                                               where, size, val);
-               else
-                       ret = dw_pcie_rd_other_conf(pp, bus, devfn,
-                                               where, size, val);
-       else
-               ret = dw_pcie_rd_own_conf(pp, where, size, val);
+       if (bus->number == pp->root_bus_nr)
+               return dw_pcie_rd_own_conf(pp, where, size, val);
 
-       return ret;
+       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);
 }
 
 static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
                        int where, int size, u32 val)
 {
        struct pcie_port *pp = bus->sysdata;
-       int ret;
 
        if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0)
                return PCIBIOS_DEVICE_NOT_FOUND;
 
-       if (bus->number != pp->root_bus_nr)
-               if (pp->ops->wr_other_conf)
-                       ret = pp->ops->wr_other_conf(pp, bus, devfn,
-                                               where, size, val);
-               else
-                       ret = dw_pcie_wr_other_conf(pp, bus, devfn,
-                                               where, size, val);
-       else
-               ret = dw_pcie_wr_own_conf(pp, where, size, val);
+       if (bus->number == pp->root_bus_nr)
+               return dw_pcie_wr_own_conf(pp, where, size, val);
 
-       return ret;
+       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);
 }
 
 static struct pci_ops dw_pcie_ops = {