Re: [2.6 patch] remove pcibios_update_resource() functions

[Greg Ungerer <gerg@snapgear.com>]

Adrian Bunk wrote:
> Russell King did the following back in 2003:
> 
> <--  snip  -->
> 
>     [PCI] pci-9: Kill per-architecture pcibios_update_resource()
>     
>     Kill pcibios_update_resource(), replacing it with pci_update_resource().
>     pci_update_resource() uses pcibios_resource_to_bus() to convert a
>     resource to a device BAR - the transformation should be exactly the
>     same as the transformation used for the PCI bridges.
>     
>     pci_update_resource "knows" about 64-bit BARs, but doesn't attempt to
>     set the high 32-bits to anything non-zero - currently no architecture
>     attempts to do something different.  If anyone cares, please fix; I'm
>     going to reflect current behaviour for the time being.
>     
>     Ivan pointed out the following architectures need to examine their
>     pcibios_update_resource() implementation - they should make sure that
>     this new implementation does the right thing.  #warning's have been
>     added where appropriate.
>     
>         ia64
>         mips
>         mips64
>     
>     This cset also includes a fix for the problem reported by AKPM where
>     64-bit arch compilers complain about the resource mask being placed
>     in a u32.
> 
> <--  snip  -->
> 
> 
> This patch removes the unused pcibios_update_resource() functions the 
> kernel gained since.
> 
> 
> Signed-off-by: Adrian Bunk <bunk@kernel.org>

The comempci.c change looks fine, for that part:

Acked-by: Greg Ungerer <gerg@uclinux.org>


> ---
> 
>  arch/frv/mb93090-mb00/pci-frv.c    |   30 ------------------------
>  arch/m68knommu/kernel/comempci.c   |    9 -------
>  arch/mips/pmc-sierra/yosemite/ht.c |   36 -----------------------------
>  arch/sh/drivers/pci/pci.c          |   32 -------------------------
>  4 files changed, 107 deletions(-)
> 
> ebd37440bafbb6f9f5ecd6315ac9953cf97f20e9 diff --git a/arch/frv/mb93090-mb00/pci-frv.c b/arch/frv/mb93090-mb00/pci-frv.c
> index 4f165c9..edae117 100644
> --- a/arch/frv/mb93090-mb00/pci-frv.c
> +++ b/arch/frv/mb93090-mb00/pci-frv.c
> @@ -19,36 +19,6 @@
>  
>  #include "pci-frv.h"
>  
> -#if 0
> -void
> -pcibios_update_resource(struct pci_dev *dev, struct resource *root,
> -			struct resource *res, int resource)
> -{
> -	u32 new, check;
> -	int reg;
> -
> -	new = res->start | (res->flags & PCI_REGION_FLAG_MASK);
> -	if (resource < 6) {
> -		reg = PCI_BASE_ADDRESS_0 + 4*resource;
> -	} else if (resource == PCI_ROM_RESOURCE) {
> -		res->flags |= IORESOURCE_ROM_ENABLE;
> -		new |= PCI_ROM_ADDRESS_ENABLE;
> -		reg = dev->rom_base_reg;
> -	} else {
> -		/* Somebody might have asked allocation of a non-standard resource */
> -		return;
> -	}
> -
> -	pci_write_config_dword(dev, reg, new);
> -	pci_read_config_dword(dev, reg, &check);
> -	if ((new ^ check) & ((new & PCI_BASE_ADDRESS_SPACE_IO) ? PCI_BASE_ADDRESS_IO_MASK : PCI_BASE_ADDRESS_MEM_MASK)) {
> -		printk(KERN_ERR "PCI: Error while updating region "
> -		       "%s/%d (%08x != %08x)\n", pci_name(dev), resource,
> -		       new, check);
> -	}
> -}
> -#endif
> -
>  /*
>   * We need to avoid collisions with `mirrored' VGA ports
>   * and other strange ISA hardware, so we always want the
> diff --git a/arch/m68knommu/kernel/comempci.c b/arch/m68knommu/kernel/comempci.c
> index 6ee00ef..0a68b5a 100644
> --- a/arch/m68knommu/kernel/comempci.c
> +++ b/arch/m68knommu/kernel/comempci.c
> @@ -375,15 +375,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
>  
>  /*****************************************************************************/
>  
> -void pcibios_update_resource(struct pci_dev *dev, struct resource *root, struct resource *r, int resource)
> -{
> -	printk(KERN_WARNING "%s(%d): no support for changing PCI resources...\n",
> -		__FILE__, __LINE__);
> -}
> -
> -
> -/*****************************************************************************/
> -
>  /*
>   *	Local routines to interrcept the standard I/O and vector handling
>   *	code. Don't include this 'till now - initialization code above needs
> diff --git a/arch/mips/pmc-sierra/yosemite/ht.c b/arch/mips/pmc-sierra/yosemite/ht.c
> index 6380662..678388f 100644
> --- a/arch/mips/pmc-sierra/yosemite/ht.c
> +++ b/arch/mips/pmc-sierra/yosemite/ht.c
> @@ -345,42 +345,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
>          return pcibios_enable_resources(dev);
>  }
>  
> -
> -
> -void pcibios_update_resource(struct pci_dev *dev, struct resource *root,
> -                             struct resource *res, int resource)
> -{
> -        u32 new, check;
> -        int reg;
> -
> -        return;
> -
> -        new = res->start | (res->flags & PCI_REGION_FLAG_MASK);
> -        if (resource < 6) {
> -                reg = PCI_BASE_ADDRESS_0 + 4 * resource;
> -        } else if (resource == PCI_ROM_RESOURCE) {
> -		res->flags |= IORESOURCE_ROM_ENABLE;
> -                reg = dev->rom_base_reg;
> -        } else {
> -                /*
> -                 * Somebody might have asked allocation of a non-standard
> -                 * resource
> -                 */
> -                return;
> -        }
> -
> -        pci_write_config_dword(dev, reg, new);
> -        pci_read_config_dword(dev, reg, &check);
> -        if ((new ^ check) &
> -            ((new & PCI_BASE_ADDRESS_SPACE_IO) ? PCI_BASE_ADDRESS_IO_MASK :
> -             PCI_BASE_ADDRESS_MEM_MASK)) {
> -                printk(KERN_ERR "PCI: Error while updating region "
> -                       "%s/%d (%08x != %08x)\n", pci_name(dev), resource,
> -                       new, check);
> -        }
> -}
> -
> -
>  void pcibios_align_resource(void *data, struct resource *res,
>                              resource_size_t size, resource_size_t align)
>  {
> diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
> index 08d2e73..f57095a 100644
> --- a/arch/sh/drivers/pci/pci.c
> +++ b/arch/sh/drivers/pci/pci.c
> @@ -76,38 +76,6 @@ void __devinit __weak pcibios_fixup_bus(struct pci_bus *bus)
>  	pci_read_bridge_bases(bus);
>  }
>  
> -void
> -pcibios_update_resource(struct pci_dev *dev, struct resource *root,
> -			struct resource *res, int resource)
> -{
> -	u32 new, check;
> -	int reg;
> -
> -	new = res->start | (res->flags & PCI_REGION_FLAG_MASK);
> -	if (resource < 6) {
> -		reg = PCI_BASE_ADDRESS_0 + 4*resource;
> -	} else if (resource == PCI_ROM_RESOURCE) {
> -		res->flags |= IORESOURCE_ROM_ENABLE;
> -		new |= PCI_ROM_ADDRESS_ENABLE;
> -		reg = dev->rom_base_reg;
> -	} else {
> -		/*
> -		 * Somebody might have asked allocation of a non-standard
> -		 * resource
> -		 */
> -		return;
> -	}
> -
> -	pci_write_config_dword(dev, reg, new);
> -	pci_read_config_dword(dev, reg, &check);
> -	if ((new ^ check) & ((new & PCI_BASE_ADDRESS_SPACE_IO) ?
> -		PCI_BASE_ADDRESS_IO_MASK : PCI_BASE_ADDRESS_MEM_MASK)) {
> -		printk(KERN_ERR "PCI: Error while updating region "
> -		       "%s/%d (%08x != %08x)\n", pci_name(dev), resource,
> -		       new, check);
> -	}
> -}
> -
>  void pcibios_align_resource(void *data, struct resource *res,
>  			    resource_size_t size, resource_size_t align)
>  			    __attribute__ ((weak));
> 
> 


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