PCI: designware: Return data directly from dw_pcie_readl_rc()

Port of a Linux commit 446fc23fb6f0cab15011d7daae856091856a65cc

  dw_pcie_readl_rc() reads a u32 value.  Previously we stored that value in
  space supplied by the caller.  Return the u32 value directly instead.

  This makes the calling code read better and makes it obvious that the
  caller need not initialize the storage.  In the following example it isn't
  clear whether "val" is initialized before being used:

    dw_pcie_readl_rc(pp, PCI_COMMAND, &val);
    if (val & PCI_COMMAND_MEMORY)
      ...

  No functional change intended.

  Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/pci/pcie-designware.h b/drivers/pci/pcie-designware.h
index 051511a267..547ab3151c 100644
--- a/drivers/pci/pcie-designware.h
+++ b/drivers/pci/pcie-designware.h
@@ -49,8 +49,7 @@ struct pcie_port {
 };
 
 struct pcie_host_ops {
-	void (*readl_rc)(struct pcie_port *pp,
-			void __iomem *dbi_base, u32 *val);
+	u32 (*readl_rc)(struct pcie_port *pp, void __iomem *dbi_base);
 	void (*writel_rc)(struct pcie_port *pp,
 			u32 val, void __iomem *dbi_base);
 	int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);