[PATCH v2 1/2] PCI: Keep pci_fixup_irqs() around after init

[PATCH v2 1/2] PCI: Keep pci_fixup_irqs() around after init

[Thierry Reding]

Remove the __init annotations in order to keep pci_fixup_irqs() around
after init (e.g. for hotplug). This requires the same change for the
implementation of pcibios_update_irq() on all architectures. While at
it, all __devinit annotations are removed as well, since they will be
useless now that HOTPLUG is always on.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
---
Changes in v2:
- remove __init and __devinit annotations altogether

 arch/alpha/kernel/pci.c      | 2 +-
 arch/arm/kernel/bios32.c     | 2 +-
 arch/ia64/pci/pci.c          | 2 +-
 arch/mips/pci/pci.c          | 2 +-
 arch/sh/drivers/pci/pci.c    | 2 +-
 arch/sparc/kernel/leon_pci.c | 2 +-
 arch/tile/kernel/pci.c       | 2 +-
 arch/tile/kernel/pci_gx.c    | 2 +-
 arch/unicore32/kernel/pci.c  | 2 +-
 arch/x86/pci/visws.c         | 2 +-
 arch/xtensa/kernel/pci.c     | 2 +-
 drivers/pci/setup-irq.c      | 4 ++--
 12 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index 9816d5a..920392f 100644
--- a/arch/alpha/kernel/pci.c
+++ b/arch/alpha/kernel/pci.c
@@ -256,7 +256,7 @@ pcibios_fixup_bus(struct pci_bus *bus)
 	}
 }
 
-void __init
+void
 pcibios_update_irq(struct pci_dev *dev, int irq)
 {
 	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 2b2f25e..0174fe6 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -272,7 +272,7 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8152, pci_fixup_it
 
 
 
-void __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
+void pcibios_update_irq(struct pci_dev *dev, int irq)
 {
 	if (debug_pci)
 		printk("PCI: Assigning IRQ %02d to %s\n", irq, pci_name(dev));
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 81acc7a..27db6a8 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -461,7 +461,7 @@ void pcibios_set_master (struct pci_dev *dev)
 	/* No special bus mastering setup handling */
 }
 
-void __devinit
+void
 pcibios_update_irq (struct pci_dev *dev, int irq)
 {
 	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index 6903568..64f0419 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -313,7 +313,7 @@ void __devinit pcibios_fixup_bus(struct pci_bus *bus)
 	}
 }
 
-void __init
+void
 pcibios_update_irq(struct pci_dev *dev, int irq)
 {
 	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index 40db2d0..1bd3e08 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -192,7 +192,7 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
 	return pci_enable_resources(dev, mask);
 }
 
-void __init pcibios_update_irq(struct pci_dev *dev, int irq)
+void pcibios_update_irq(struct pci_dev *dev, int irq)
 {
 	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
 }
diff --git a/arch/sparc/kernel/leon_pci.c b/arch/sparc/kernel/leon_pci.c
index 21dcda7..404621b 100644
--- a/arch/sparc/kernel/leon_pci.c
+++ b/arch/sparc/kernel/leon_pci.c
@@ -102,7 +102,7 @@ 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)
+void pcibios_update_irq(struct pci_dev *dev, int irq)
 {
 #ifdef CONFIG_PCI_DEBUG
 	printk(KERN_DEBUG "LEONPCI: Assigning IRQ %02d to %s\n", irq,
diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c
index 33c1086..6245bba 100644
--- a/arch/tile/kernel/pci.c
+++ b/arch/tile/kernel/pci.c
@@ -406,7 +406,7 @@ 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)
+void pcibios_update_irq(struct pci_dev *dev, int irq)
 {
 	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
 }
diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c
index 0e213e3..5faad0b 100644
--- a/arch/tile/kernel/pci_gx.c
+++ b/arch/tile/kernel/pci_gx.c
@@ -1036,7 +1036,7 @@ 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)
+void pcibios_update_irq(struct pci_dev *dev, int irq)
 {
 	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
 }
diff --git a/arch/unicore32/kernel/pci.c b/arch/unicore32/kernel/pci.c
index 46cb6c9..c07ecc5 100644
--- a/arch/unicore32/kernel/pci.c
+++ b/arch/unicore32/kernel/pci.c
@@ -154,7 +154,7 @@ 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)
+void pcibios_update_irq(struct pci_dev *dev, int irq)
 {
 	if (debug_pci)
 		printk(KERN_DEBUG "PCI: Assigning IRQ %02d to %s\n",
diff --git a/arch/x86/pci/visws.c b/arch/x86/pci/visws.c
index 6f2f8ee..9d736e7 100644
--- a/arch/x86/pci/visws.c
+++ b/arch/x86/pci/visws.c
@@ -62,7 +62,7 @@ out:
 	return irq;
 }
 
-void __init pcibios_update_irq(struct pci_dev *dev, int irq)
+void pcibios_update_irq(struct pci_dev *dev, int irq)
 {
 	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
 }
diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
index 69759e9..6f9b40c 100644
--- a/arch/xtensa/kernel/pci.c
+++ b/arch/xtensa/kernel/pci.c
@@ -212,7 +212,7 @@ void pcibios_set_master(struct pci_dev *dev)
 
 /* the next one is stolen from the alpha port... */
 
-void __init
+void
 pcibios_update_irq(struct pci_dev *dev, int irq)
 {
 	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
diff --git a/drivers/pci/setup-irq.c b/drivers/pci/setup-irq.c
index eb219a1..270ae7b 100644
--- a/drivers/pci/setup-irq.c
+++ b/drivers/pci/setup-irq.c
@@ -18,7 +18,7 @@
 #include <linux/cache.h>
 
 
-static void __init
+static void
 pdev_fixup_irq(struct pci_dev *dev,
 	       u8 (*swizzle)(struct pci_dev *, u8 *),
 	       int (*map_irq)(const struct pci_dev *, u8, u8))
@@ -54,7 +54,7 @@ pdev_fixup_irq(struct pci_dev *dev,
 	pcibios_update_irq(dev, irq);
 }
 
-void __init
+void
 pci_fixup_irqs(u8 (*swizzle)(struct pci_dev *, u8 *),
 	       int (*map_irq)(const struct pci_dev *, u8, u8))
 {
-- 
1.7.12

[PATCH v2 2/2] PCI: Provide a default pcibios_update_irq()

[Thierry Reding]

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@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.

Changes in v2:
- drop __devinit annotation
- use dev_dbg()

 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      | 5 +++++
 14 files changed, 5 insertions(+), 89 deletions(-)

diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index 920392f..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
-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 0174fe6..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 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 27db6a8..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
-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 64f0419..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
-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 1bd3e08..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 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 404621b..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 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 6245bba..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 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 5faad0b..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 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 c07ecc5..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 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 9d736e7..3e6d2a6 100644
--- a/arch/x86/pci/visws.c
+++ b/arch/x86/pci/visws.c
@@ -62,11 +62,6 @@ out:
 	return irq;
 }
 
-void 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 6f9b40c..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
-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 270ae7b..3d61ce3 100644
--- a/drivers/pci/setup-irq.c
+++ b/drivers/pci/setup-irq.c
@@ -17,6 +17,11 @@
 #include <linux/ioport.h>
 #include <linux/cache.h>
 
+void __weak pcibios_update_irq(struct pci_dev *dev, int irq)
+{
+	dev_dbg(&dev->dev, "Assigning IRQ %02d\n", irq);
+	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
+}
 
 static void
 pdev_fixup_irq(struct pci_dev *dev,
-- 
1.7.12

Re: [PATCH v2 1/2] PCI: Keep pci_fixup_irqs() around after init

[Greg Kroah-Hartman]

On Mon, Sep 17, 2012 at 01:22:53PM +0200, Thierry Reding wrote:
> Remove the __init annotations in order to keep pci_fixup_irqs() around
> after init (e.g. for hotplug). This requires the same change for the
> implementation of pcibios_update_irq() on all architectures. While at
> it, all __devinit annotations are removed as well, since they will be
> useless now that HOTPLUG is always on.
> 
> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
> ---
> Changes in v2:
> - remove __init and __devinit annotations altogether

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Re: [PATCH v2 1/2] PCI: Keep pci_fixup_irqs() around after init

[Bjorn Helgaas]

On Mon, Sep 17, 2012 at 5:34 AM, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
> On Mon, Sep 17, 2012 at 01:22:53PM +0200, Thierry Reding wrote:
>> Remove the __init annotations in order to keep pci_fixup_irqs() around
>> after init (e.g. for hotplug). This requires the same change for the
>> implementation of pcibios_update_irq() on all architectures. While at
>> it, all __devinit annotations are removed as well, since they will be
>> useless now that HOTPLUG is always on.
>>
>> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
>> ---
>> Changes in v2:
>> - remove __init and __devinit annotations altogether
>
> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

I applied these (both 1/2 and 2/2) to my "next" branch.  Thanks!

Bjorn

Re: [PATCH v2 2/2] PCI: Provide a default pcibios_update_irq()

[Stephen Rothwell]

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Hi,

On Mon, 17 Sep 2012 13:22:54 +0200 Thierry Reding <thierry.reding@avionic-design.de> wrote:
>
> diff --git a/drivers/pci/setup-irq.c b/drivers/pci/setup-irq.c
> index 270ae7b..3d61ce3 100644
> --- a/drivers/pci/setup-irq.c
> +++ b/drivers/pci/setup-irq.c
> @@ -17,6 +17,11 @@
>  #include <linux/ioport.h>
>  #include <linux/cache.h>
>  
> +void __weak pcibios_update_irq(struct pci_dev *dev, int irq)
> +{
> +	dev_dbg(&dev->dev, "Assigning IRQ %02d\n", irq);
> +	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
> +}
>  
>  static void
>  pdev_fixup_irq(struct pci_dev *dev,

Didn't we have a problem with some compiler versions when the weak
definition was in the same file as the call (there is a call to this
function in drivers/pci/setup-irq.c)?

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

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