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

[PATCH 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.

 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

Re: [PATCH 1/2] PCI: Annotate pci_fixup_irqs with __devinit

[Bjorn Helgaas]

+cc Greg KH

On Fri, Sep 14, 2012 at 2:44 PM, Thierry Reding
<thierry.reding@avionic-design.de> wrote:
> In order to keep pci_fixup_irqs() around after init (e.g. for hotplug),
> mark it __devinit instead of __init. This requires the same change for
> the implementation of the pcibios_update_irq() function on all
> architectures.
>
> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
> ---
> Note: Ideally these annotations should go away completely in order to
> be independent of the HOTPLUG symbol. However, there is work underway
> to get rid of HOTPLUG altogether, so I've kept the __devinit for now.
>
>  arch/alpha/kernel/pci.c   | 2 +-
>  arch/mips/pci/pci.c       | 2 +-
>  arch/sh/drivers/pci/pci.c | 2 +-
>  arch/x86/pci/visws.c      | 2 +-
>  arch/xtensa/kernel/pci.c  | 2 +-
>  drivers/pci/setup-irq.c   | 4 ++--
>  6 files changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
> index 9816d5a..6192b35 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 __devinit
>  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..af3dc05 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 __devinit
>  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..d16fabe 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 __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
>  {
>         pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
>  }
> diff --git a/arch/x86/pci/visws.c b/arch/x86/pci/visws.c
> index 6f2f8ee..15bdfbf 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 __devinit 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..efc3369 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 __devinit
>  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..f0bcd56 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 __devinit
>  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 __devinit
>  pci_fixup_irqs(u8 (*swizzle)(struct pci_dev *, u8 *),
>                int (*map_irq)(const struct pci_dev *, u8, u8))
>  {
> --
> 1.7.12
>

Re: [PATCH 1/2] PCI: Annotate pci_fixup_irqs with __devinit

[Greg Kroah-Hartman]

On Fri, Sep 14, 2012 at 02:53:11PM -0600, Bjorn Helgaas wrote:
> +cc Greg KH
> 
> On Fri, Sep 14, 2012 at 2:44 PM, Thierry Reding
> <thierry.reding@avionic-design.de> wrote:
> > In order to keep pci_fixup_irqs() around after init (e.g. for hotplug),
> > mark it __devinit instead of __init. This requires the same change for
> > the implementation of the pcibios_update_irq() function on all
> > architectures.
> >
> > Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
> > ---
> > Note: Ideally these annotations should go away completely in order to
> > be independent of the HOTPLUG symbol. However, there is work underway
> > to get rid of HOTPLUG altogether, so I've kept the __devinit for now.

No, just take away the __init marking completly.  For 3.7,
CONFIG_HOTPLUG will always be enabled, making it be the same thing.
That way this saves me the time and energy from deleting the __devinit
markings when I get to that point in the patch series :)

thanks,

greg k-h

Re: [PATCH 1/2] PCI: Annotate pci_fixup_irqs with __devinit

[Thierry Reding]

[-- Attachment #1: Type: text/plain, Size: 1199 bytes --]

On Fri, Sep 14, 2012 at 03:35:31PM -0700, Greg Kroah-Hartman wrote:
> On Fri, Sep 14, 2012 at 02:53:11PM -0600, Bjorn Helgaas wrote:
> > +cc Greg KH
> > 
> > On Fri, Sep 14, 2012 at 2:44 PM, Thierry Reding
> > <thierry.reding@avionic-design.de> wrote:
> > > In order to keep pci_fixup_irqs() around after init (e.g. for hotplug),
> > > mark it __devinit instead of __init. This requires the same change for
> > > the implementation of the pcibios_update_irq() function on all
> > > architectures.
> > >
> > > Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
> > > ---
> > > Note: Ideally these annotations should go away completely in order to
> > > be independent of the HOTPLUG symbol. However, there is work underway
> > > to get rid of HOTPLUG altogether, so I've kept the __devinit for now.
> 
> No, just take away the __init marking completly.  For 3.7,
> CONFIG_HOTPLUG will always be enabled, making it be the same thing.
> That way this saves me the time and energy from deleting the __devinit
> markings when I get to that point in the patch series :)

Done. I'll give other people some time to comment before sending the
updated series.

Thierry

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

[Geert Uytterhoeven]

On Fri, Sep 14, 2012 at 10:44 PM, Thierry Reding
<thierry.reding@avionic-design.de> wrote:
> --- 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));

pr_debug()?
Or even better, dev_dbg()?

> +#endif
> +       pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
> +}

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

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

[Thierry Reding]

[-- Attachment #1: Type: text/plain, Size: 799 bytes --]

On Sat, Sep 15, 2012 at 09:32:10AM +0200, Geert Uytterhoeven wrote:
> On Fri, Sep 14, 2012 at 10:44 PM, Thierry Reding
> <thierry.reding@avionic-design.de> wrote:
> > --- 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));
> 
> pr_debug()?
> Or even better, dev_dbg()?

The problem with pr_debug() and dev_dbg() is that they will be compiled
out if DEBUG is not defined. Perhaps we should pass -DDEBUG if PCI_DEBUG
is configured and make this dev_dbg()?

Thierry

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

[Bjorn Helgaas]

On Sat, Sep 15, 2012 at 1:53 AM, Thierry Reding
<thierry.reding@avionic-design.de> wrote:
> On Sat, Sep 15, 2012 at 09:32:10AM +0200, Geert Uytterhoeven wrote:
>> On Fri, Sep 14, 2012 at 10:44 PM, Thierry Reding
>> <thierry.reding@avionic-design.de> wrote:
>> > --- 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));
>>
>> pr_debug()?
>> Or even better, dev_dbg()?
>
> The problem with pr_debug() and dev_dbg() is that they will be compiled
> out if DEBUG is not defined. Perhaps we should pass -DDEBUG if PCI_DEBUG
> is configured and make this dev_dbg()?

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

[Bjorn Helgaas]

On Sat, Sep 15, 2012 at 1:53 AM, Thierry Reding
<thierry.reding@avionic-design.de> wrote:
> On Sat, Sep 15, 2012 at 09:32:10AM +0200, Geert Uytterhoeven wrote:
>> On Fri, Sep 14, 2012 at 10:44 PM, Thierry Reding
>> <thierry.reding@avionic-design.de> wrote:
>> > --- 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));
>>
>> pr_debug()?
>> Or even better, dev_dbg()?
>
> The problem with pr_debug() and dev_dbg() is that they will be compiled
> out if DEBUG is not defined. Perhaps we should pass -DDEBUG if PCI_DEBUG
> is configured and make this dev_dbg()?

Sorry, fat-fingered the previous empty response.

We already have this in drivers/pci/Makefile:

    ccflags-$(CONFIG_PCI_DEBUG) := -DDEBUG

so dev_dbg() should be perfect.

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

[Thierry Reding]

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On Sat, Sep 15, 2012 at 04:23:33PM -0600, Bjorn Helgaas wrote:
> On Sat, Sep 15, 2012 at 1:53 AM, Thierry Reding
> <thierry.reding@avionic-design.de> wrote:
> > On Sat, Sep 15, 2012 at 09:32:10AM +0200, Geert Uytterhoeven wrote:
> >> On Fri, Sep 14, 2012 at 10:44 PM, Thierry Reding
> >> <thierry.reding@avionic-design.de> wrote:
> >> > --- 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));
> >>
> >> pr_debug()?
> >> Or even better, dev_dbg()?
> >
> > The problem with pr_debug() and dev_dbg() is that they will be compiled
> > out if DEBUG is not defined. Perhaps we should pass -DDEBUG if PCI_DEBUG
> > is configured and make this dev_dbg()?
> 
> Sorry, fat-fingered the previous empty response.
> 
> We already have this in drivers/pci/Makefile:
> 
>     ccflags-$(CONFIG_PCI_DEBUG) := -DDEBUG
> 
> so dev_dbg() should be perfect.

Yeah, this occurred to me as well and I was just about to look it up
when I read your response. I'll make it dev_dbg() then.

Thierry

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