[PATCH 2/7] MIPS: Embed syscore_ops in PCI context

[Thierry Reding]

From: Thierry Reding <tred...@nvidia.com>

This enables the syscore callbacks to obtain the PCI context without
relying on a separate global variable.

Signed-off-by: Thierry Reding <tred...@nvidia.com>
---
 arch/mips/pci/pci-alchemy.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/arch/mips/pci/pci-alchemy.c b/arch/mips/pci/pci-alchemy.c
index a20de7160b6b..02f0616518e1 100644
--- a/arch/mips/pci/pci-alchemy.c
+++ b/arch/mips/pci/pci-alchemy.c
@@ -33,6 +33,7 @@
 
 struct alchemy_pci_context {
        struct pci_controller alchemy_pci_ctrl; /* leave as first member! */
+       struct syscore_ops pmops;
        void __iomem *regs;                     /* ctrl base */
        /* tools for wired entry for config space access */
        unsigned long last_elo0;
@@ -46,6 +47,12 @@ struct alchemy_pci_context {
        int (*board_pci_idsel)(unsigned int devsel, int assert);
 };
 
+static inline struct alchemy_pci_context *
+syscore_to_pci_context(struct syscore_ops *ops)
+{
+       return container_of(ops, struct alchemy_pci_context, pmops);
+}
+
 /* for syscore_ops. There's only one PCI controller on Alchemy chips, so this
  * should suffice for now.
  */
@@ -306,9 +313,7 @@ static int alchemy_pci_def_idsel(unsigned int devsel, int 
assert)
 /* save PCI controller register contents. */
 static int alchemy_pci_suspend(struct syscore_ops *ops)
 {
-       struct alchemy_pci_context *ctx = __alchemy_pci_ctx;
-       if (!ctx)
-               return 0;
+       struct alchemy_pci_context *ctx = syscore_to_pci_context(ops);
 
        ctx->pm[0]  = __raw_readl(ctx->regs + PCI_REG_CMEM);
        ctx->pm[1]  = __raw_readl(ctx->regs + PCI_REG_CONFIG) & 0x0009ffff;
@@ -328,9 +333,7 @@ static int alchemy_pci_suspend(struct syscore_ops *ops)
 
 static void alchemy_pci_resume(struct syscore_ops *ops)
 {
-       struct alchemy_pci_context *ctx = __alchemy_pci_ctx;
-       if (!ctx)
-               return;
+       struct alchemy_pci_context *ctx = syscore_to_pci_context(ops);
 
        __raw_writel(ctx->pm[0],  ctx->regs + PCI_REG_CMEM);
        __raw_writel(ctx->pm[2],  ctx->regs + PCI_REG_B2BMASK_CCH);
@@ -354,11 +357,6 @@ static void alchemy_pci_resume(struct syscore_ops *ops)
        alchemy_pci_wired_entry(ctx);   /* install it */
 }
 
-static struct syscore_ops alchemy_pci_pmops = {
-       .suspend        = alchemy_pci_suspend,
-       .resume         = alchemy_pci_resume,
-};
-
 static int alchemy_pci_probe(struct platform_device *pdev)
 {
        struct alchemy_pci_platdata *pd = pdev->dev.platform_data;
@@ -478,7 +476,9 @@ static int alchemy_pci_probe(struct platform_device *pdev)
 
        __alchemy_pci_ctx = ctx;
        platform_set_drvdata(pdev, ctx);
-       register_syscore_ops(&alchemy_pci_pmops);
+       ctx->pmops.suspend = alchemy_pci_suspend;
+       ctx->pmops.resume = alchemy_pci_resume;
+       register_syscore_ops(&ctx->pmops);
        register_pci_controller(&ctx->alchemy_pci_ctrl);
 
        dev_info(&pdev->dev, "PCI controller at %ld MHz\n",
-- 
2.48.1