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PCI: create common pcibios_err_to_errno

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For returning errors out to non-PCI code.  Re-name xen's version.

Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Alex Williamson 2012-06-11 05:27:33 +00:00 committed by Bjorn Helgaas
parent c63587d7f5
commit a696165140
2 changed files with 29 additions and 3 deletions
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6
drivers/xen/xen-pciback/conf_space.c
View file

@ -124,7 +124,7 @@ static inline u32 merge_value(u32 val, u32 new_val, u32 new_val_mask,
return val; return val;
} }
static int pcibios_err_to_errno(int err) static int xen_pcibios_err_to_errno(int err)
{ {
switch (err) { switch (err) {
case PCIBIOS_SUCCESSFUL: case PCIBIOS_SUCCESSFUL:
@ -202,7 +202,7 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
pci_name(dev), size, offset, value); pci_name(dev), size, offset, value);
*ret_val = value; *ret_val = value;
return pcibios_err_to_errno(err); return xen_pcibios_err_to_errno(err);
} }
int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size, u32 value) int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size, u32 value)
@ -290,7 +290,7 @@ int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size, u32 value)
} }
} }
return pcibios_err_to_errno(err); return xen_pcibios_err_to_errno(err);
} }
void xen_pcibk_config_free_dyn_fields(struct pci_dev *dev) void xen_pcibk_config_free_dyn_fields(struct pci_dev *dev)

26
include/linux/pci.h
View file

@ -474,6 +474,32 @@ static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false;
#define PCIBIOS_SET_FAILED 0x88 #define PCIBIOS_SET_FAILED 0x88
#define PCIBIOS_BUFFER_TOO_SMALL 0x89 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
/*
* Translate above to generic errno for passing back through non-pci.
*/
static inline int pcibios_err_to_errno(int err)
{
if (err <= PCIBIOS_SUCCESSFUL)
return err; /* Assume already errno */
switch (err) {
case PCIBIOS_FUNC_NOT_SUPPORTED:
return -ENOENT;
case PCIBIOS_BAD_VENDOR_ID:
return -EINVAL;
case PCIBIOS_DEVICE_NOT_FOUND:
return -ENODEV;
case PCIBIOS_BAD_REGISTER_NUMBER:
return -EFAULT;
case PCIBIOS_SET_FAILED:
return -EIO;
case PCIBIOS_BUFFER_TOO_SMALL:
return -ENOSPC;
}
return -ENOTTY;
}
/* Low-level architecture-dependent routines */ /* Low-level architecture-dependent routines */
struct pci_ops { struct pci_ops {