[PATCH 2/2] PCI: Provide a default pcibios_update_irq()
Thierry Reding
thierry.reding at avionic-design.de
Fri Sep 14 16:44:16 EDT 2012
Most architectures implement this in exactly the same way. Instead of
having each architecture duplicate this function, provide a single
implementation in the core and make it a weak symbol so that it can be
overridden on architectures where it is required.
Signed-off-by: Thierry Reding <thierry.reding at avionic-design.de>
---
Note: ARM and Unicore32 did use a debug_pci variable to check whether or
not to output a debug message in pcibios_update_irq(). SPARC/LEON checks
for CONFIG_PCI_DEBUG instead. I've adopted the SPARC variant in this
patch. I assumed that in the interest of unification this would be a
good compromise. If not, please let me know.
Also, SPARC64 had an empty pcibios_update_irq(). I've opted to drop it
in favour of the default implementation, which just writes a single byte
in the device's configuration space. I assumed that this should still
work but perhaps was just not used on SPARC64. If this is known to break
SPARC64 I can keep the noop implementation.
arch/alpha/kernel/pci.c | 6 ------
arch/arm/kernel/bios32.c | 9 ---------
arch/ia64/pci/pci.c | 8 --------
arch/m68k/kernel/pcibios.c | 5 -----
arch/mips/pci/pci.c | 6 ------
arch/sh/drivers/pci/pci.c | 5 -----
arch/sparc/kernel/leon_pci.c | 9 ---------
arch/sparc/kernel/pci.c | 4 ----
arch/tile/kernel/pci.c | 8 --------
arch/tile/kernel/pci_gx.c | 8 --------
arch/unicore32/kernel/pci.c | 8 --------
arch/x86/pci/visws.c | 5 -----
arch/xtensa/kernel/pci.c | 8 --------
drivers/pci/setup-irq.c | 8 ++++++++
14 files changed, 8 insertions(+), 89 deletions(-)
diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index 6192b35..ef75714 100644
--- a/arch/alpha/kernel/pci.c
+++ b/arch/alpha/kernel/pci.c
@@ -256,12 +256,6 @@ pcibios_fixup_bus(struct pci_bus *bus)
}
}
-void __devinit
-pcibios_update_irq(struct pci_dev *dev, int irq)
-{
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
-}
-
int
pcibios_enable_device(struct pci_dev *dev, int mask)
{
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 2b2f25e..9cf16b8 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -270,15 +270,6 @@ static void __devinit pci_fixup_it8152(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8152, pci_fixup_it8152);
-
-
-void __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
-{
- if (debug_pci)
- printk("PCI: Assigning IRQ %02d to %s\n", irq, pci_name(dev));
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
-}
-
/*
* If the bus contains any of these devices, then we must not turn on
* parity checking of any kind. Currently this is CyberPro 20x0 only.
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 81acc7a..a7ebe94 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -461,14 +461,6 @@ void pcibios_set_master (struct pci_dev *dev)
/* No special bus mastering setup handling */
}
-void __devinit
-pcibios_update_irq (struct pci_dev *dev, int irq)
-{
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
-
- /* ??? FIXME -- record old value for shutdown. */
-}
-
int
pcibios_enable_device (struct pci_dev *dev, int mask)
{
diff --git a/arch/m68k/kernel/pcibios.c b/arch/m68k/kernel/pcibios.c
index b2988aa..73fa0b5 100644
--- a/arch/m68k/kernel/pcibios.c
+++ b/arch/m68k/kernel/pcibios.c
@@ -87,11 +87,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
return 0;
}
-void pcibios_update_irq(struct pci_dev *dev, int irq)
-{
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
-}
-
void __devinit pcibios_fixup_bus(struct pci_bus *bus)
{
struct pci_dev *dev;
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index af3dc05..04e35bc 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -313,12 +313,6 @@ void __devinit pcibios_fixup_bus(struct pci_bus *bus)
}
}
-void __devinit
-pcibios_update_irq(struct pci_dev *dev, int irq)
-{
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
-}
-
#ifdef CONFIG_HOTPLUG
EXPORT_SYMBOL(PCIBIOS_MIN_IO);
EXPORT_SYMBOL(PCIBIOS_MIN_MEM);
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index d16fabe..a7e078f 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -192,11 +192,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
return pci_enable_resources(dev, mask);
}
-void __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
-{
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
-}
-
static void __init
pcibios_bus_report_status_early(struct pci_channel *hose,
int top_bus, int current_bus,
diff --git a/arch/sparc/kernel/leon_pci.c b/arch/sparc/kernel/leon_pci.c
index 21dcda7..fc05211 100644
--- a/arch/sparc/kernel/leon_pci.c
+++ b/arch/sparc/kernel/leon_pci.c
@@ -102,15 +102,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
return pci_enable_resources(dev, mask);
}
-void __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
-{
-#ifdef CONFIG_PCI_DEBUG
- printk(KERN_DEBUG "LEONPCI: Assigning IRQ %02d to %s\n", irq,
- pci_name(dev));
-#endif
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
-}
-
/* in/out routines taken from pcic.c
*
* This probably belongs here rather than ioport.c because
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 065b88c..acc8c83 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -622,10 +622,6 @@ void __devinit pcibios_fixup_bus(struct pci_bus *pbus)
{
}
-void pcibios_update_irq(struct pci_dev *pdev, int irq)
-{
-}
-
resource_size_t pcibios_align_resource(void *data, const struct resource *res,
resource_size_t size, resource_size_t align)
{
diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c
index 33c1086..dbdab34 100644
--- a/arch/tile/kernel/pci.c
+++ b/arch/tile/kernel/pci.c
@@ -404,14 +404,6 @@ void pcibios_set_master(struct pci_dev *dev)
}
/*
- * This is called from the generic Linux layer.
- */
-void __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
-{
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
-}
-
-/*
* Enable memory and/or address decoding, as appropriate, for the
* device described by the 'dev' struct.
*
diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c
index 0e213e3..2ba6d05 100644
--- a/arch/tile/kernel/pci_gx.c
+++ b/arch/tile/kernel/pci_gx.c
@@ -1034,14 +1034,6 @@ char __devinit *pcibios_setup(char *str)
}
/*
- * This is called from the generic Linux layer.
- */
-void __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
-{
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
-}
-
-/*
* Enable memory address decoding, as appropriate, for the
* device described by the 'dev' struct. The I/O decoding
* is disabled, though the TILE-Gx supports I/O addressing.
diff --git a/arch/unicore32/kernel/pci.c b/arch/unicore32/kernel/pci.c
index 46cb6c9..b0056f6 100644
--- a/arch/unicore32/kernel/pci.c
+++ b/arch/unicore32/kernel/pci.c
@@ -154,14 +154,6 @@ void __init puv3_pci_adjust_zones(unsigned long *zone_size,
zhole_size[0] = 0;
}
-void __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
-{
- if (debug_pci)
- printk(KERN_DEBUG "PCI: Assigning IRQ %02d to %s\n",
- irq, pci_name(dev));
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
-}
-
/*
* If the bus contains any of these devices, then we must not turn on
* parity checking of any kind.
diff --git a/arch/x86/pci/visws.c b/arch/x86/pci/visws.c
index 15bdfbf..3e6d2a6 100644
--- a/arch/x86/pci/visws.c
+++ b/arch/x86/pci/visws.c
@@ -62,11 +62,6 @@ out:
return irq;
}
-void __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
-{
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
-}
-
int __init pci_visws_init(void)
{
pcibios_enable_irq = &pci_visws_enable_irq;
diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
index efc3369..54354de 100644
--- a/arch/xtensa/kernel/pci.c
+++ b/arch/xtensa/kernel/pci.c
@@ -210,14 +210,6 @@ void pcibios_set_master(struct pci_dev *dev)
/* No special bus mastering setup handling */
}
-/* the next one is stolen from the alpha port... */
-
-void __devinit
-pcibios_update_irq(struct pci_dev *dev, int irq)
-{
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
-}
-
int pcibios_enable_device(struct pci_dev *dev, int mask)
{
u16 cmd, old_cmd;
diff --git a/drivers/pci/setup-irq.c b/drivers/pci/setup-irq.c
index f0bcd56..2d39268 100644
--- a/drivers/pci/setup-irq.c
+++ b/drivers/pci/setup-irq.c
@@ -17,6 +17,14 @@
#include <linux/ioport.h>
#include <linux/cache.h>
+void __devinit __weak pcibios_update_irq(struct pci_dev *dev, int irq)
+{
+#ifdef CONFIG_PCI_DEBUG
+ printk(KERN_DEBUG "PCI: Assigning IRQ %02d to %s\n", irq,
+ pci_name(dev));
+#endif
+ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
+}
static void __devinit
pdev_fixup_irq(struct pci_dev *dev,
--
1.7.12
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