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 into PCI's core that can be used by all
architectures as a default. If necessary, it can be over-ridden by
architecture-specific code.
No functional change.
Signed-off-by: Myron Stowe <myron.stowe@xxxxxxxxxx>
---
drivers/pci/pci.c | 12 ++++++++++++
include/linux/pci.h | 1 +
2 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 77cb54a..0f6d472 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2671,6 +2671,18 @@ static void __pci_set_master(struct pci_dev *dev, bool 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
*
diff --git a/include/linux/pci.h b/include/linux/pci.h
index fefb4e1..fdcff0e 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -644,6 +644,7 @@ 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 */
--
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