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pci: Fix virPCIGetPhysicalFunction()'s callers

Browse Source 
Commit c8b1a83605 changed the function, making it
impossible for callers to be able to tell whether a
non-negative return value means "physical function
address found and parsed correctly" or "couldn't find
corresponding physical function".

The important difference between the two being that,
in the latter case, the returned pointer is NULL and
should never, ever be dereferenced.

In order to cope with these changes, the callers
have to be updated.
This commit is contained in:
Andrea Bolognani 2016-05-25 10:01:58 +02:00
parent 063da39376
commit fc9ba9d574
2 changed files with 11 additions and 2 deletions
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10
src/node_device/node_device_linux_sysfs.c
View File

@ -154,19 +154,25 @@ nodeDeviceSysfsGetPCISRIOVCaps(const char *sysfsPath,
data->pci_dev.flags &= ~VIR_NODE_DEV_CAP_FLAG_PCI_VIRTUAL_FUNCTION;
data->pci_dev.flags &= ~VIR_NODE_DEV_CAP_FLAG_PCI_PHYSICAL_FUNCTION;
if (!virPCIGetPhysicalFunction(sysfsPath, &data->pci_dev.physical_function))
ret = virPCIGetPhysicalFunction(sysfsPath,
&data->pci_dev.physical_function);
if (ret < 0)
goto cleanup;
if (data->pci_dev.physical_function)
data->pci_dev.flags |= VIR_NODE_DEV_CAP_FLAG_PCI_PHYSICAL_FUNCTION;
ret = virPCIGetVirtualFunctions(sysfsPath, &data->pci_dev.virtual_functions,
&data->pci_dev.num_virtual_functions,
&data->pci_dev.max_virtual_functions);
if (ret < 0)
return ret;
goto cleanup;
if (data->pci_dev.num_virtual_functions > 0 ||
data->pci_dev.max_virtual_functions > 0)
data->pci_dev.flags |= VIR_NODE_DEV_CAP_FLAG_PCI_VIRTUAL_FUNCTION;
cleanup:
return ret;
}

3
src/util/virpci.c
View File

@ -2732,6 +2732,9 @@ virPCIGetVirtualFunctionInfo(const char *vf_sysfs_device_path,
if (virPCIGetPhysicalFunction(vf_sysfs_device_path, &pf_config_address) < 0)
return ret;
if (!pf_config_address)
return ret;
if (virPCIDeviceAddressGetSysfsFile(pf_config_address,
&pf_sysfs_device_path) < 0) {