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Subject[PATCH 4/5] pci: Create common pcibios_err_to_errno
Date
For returning errors out to non-PCI code.  Re-name xen's version.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
drivers/xen/xen-pciback/conf_space.c | 6 +++---
include/linux/pci.h | 26 ++++++++++++++++++++++++++
2 files changed, 29 insertions(+), 3 deletions(-)
diff --git a/drivers/xen/xen-pciback/conf_space.c b/drivers/xen/xen-pciback/conf_space.c
index 30d7be0..46ae0f9 100644
--- a/drivers/xen/xen-pciback/conf_space.c
+++ b/drivers/xen/xen-pciback/conf_space.c
@@ -124,7 +124,7 @@ static inline u32 merge_value(u32 val, u32 new_val, u32 new_val_mask,
return val;
}

-static int pcibios_err_to_errno(int err)
+static int xen_pcibios_err_to_errno(int err)
{
switch (err) {
case PCIBIOS_SUCCESSFUL:
@@ -202,7 +202,7 @@ out:
pci_name(dev), size, offset, 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)
@@ -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)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 1b6d1c5..a8b5e8c 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -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_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 */

struct pci_ops {


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