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

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Date:	Fri, 14 Sep 2012 23:11:18 +0200
From:	Thierry Reding <thierry.reding@...onic-design.de>
To:	Russell King <linux@....linux.org.uk>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] ARM: pci: Allow passing per-controller private data

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.

Signed-off-by: Thierry Reding <thierry.reding@...onic-design.de>
---
 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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