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PCI: pull pcibios_setup() up into core 

Currently, all of the architectures implement their own pcibios_setup()
routine.  Most of the implementations do nothing so this patch introduces
a generic (__weak) routine in the core that can be used by all
architectures as a default.  If necessary, it can be overridden by
architecture-specific code.

Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Myron Stowe 2012-06-25 21:30:57 -06:00 committed by Bjorn Helgaas
parent cfaf025112
commit 2b6f2c3520
2 changed files with 13 additions and 0 deletions
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12
drivers/pci/pci.c
View File

@ -2665,6 +2665,18 @@ static void __pci_set_master(struct pci_dev *dev, bool enable)
dev->is_busmaster = enable;
}
/**
* pcibios_setup - process "pci=" kernel boot arguments
* @str: string used to pass in "pci=" kernel boot arguments
*
* Process kernel boot arguments. This is the default implementation.
* Architecture specific implementations can override this as necessary.
*/
char * __weak __init pcibios_setup(char *str)
{
return str;
}
/**
* pcibios_set_master - enable PCI bus-mastering for device dev
* @dev: the PCI device to enable

1
include/linux/pci.h
View File

@ -642,6 +642,7 @@ extern int no_pci_devices(void);
void pcibios_fixup_bus(struct pci_bus *);
int __must_check pcibios_enable_device(struct pci_dev *, int mask);
/* Architecture specific versions may override this (weak) */
char *pcibios_setup(char *str);
/* Used only when drivers/pci/setup.c is used */