Thread (9 messages) flat view 9 messages, 2 authors, 2012-09-18

[PATCH 2/2] ARM: pci: Allow passing per-controller private data

From: bhelgaas@google.com (Bjorn Helgaas)
Date: 2012-09-18 17:21:45
Also in: lkml

On Fri, Sep 14, 2012 at 3:11 PM, Thierry Reding
[off-list ref] wrote:
In order to allow drivers to specify private data for each controller,
this commit adds a private_data field to the struct hw_pci. This field
is an array of nr_controllers pointers that will be used to initialize
the private_data field of the corresponding controller's pci_sys_data
structure.
I guess you aren't changing the design here because struct hw_pci
already includes "nr_controllers," but having nr_controllers and a
private_data[] array sounds like something that might make it hard to
hot-add a host bridge after boot.
quoted hunk ↗ jump to hunk
Signed-off-by: Thierry Reding <redacted>
---
 arch/arm/include/asm/mach/pci.h | 1 +
 arch/arm/kernel/bios32.c        | 3 +++
 2 files changed, 4 insertions(+)
diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h
index 26c511f..736cb8d 100644
--- a/arch/arm/include/asm/mach/pci.h
+++ b/arch/arm/include/asm/mach/pci.h
@@ -21,6 +21,7 @@ struct hw_pci {
 #endif
        struct pci_ops  *ops;
        int             nr_controllers;
+       void            **private_data;
        int             (*setup)(int nr, struct pci_sys_data *);
        struct pci_bus *(*scan)(int nr, struct pci_sys_data *);
        void            (*preinit)(void);
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 7288093..07a38d8 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -442,6 +442,9 @@ static void __devinit pcibios_init_hw(struct hw_pci *hw, struct list_head *head)
                sys->map_irq = hw->map_irq;
                INIT_LIST_HEAD(&sys->resources);

+               if (hw->private_data)
+                       sys->private_data = hw->private_data[nr];
+
                ret = hw->setup(nr, sys);

                if (ret > 0) {
--
1.7.12
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