[libvirt] [PATCH v3] pci: Give an explicit error if device not found

[Cole Robinson]

v2: Use intended F_OK. Drop devdir param, just check dev->path for device
existence.

v3: Use virReportSystemError, include dev->path in error message.

Signed-off-by: Cole Robinson <crobinso at redhat.com>
---
 src/util/pci.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/src/util/pci.c b/src/util/pci.c
index 81193b7..a1bd8e3 100644
--- a/src/util/pci.c
+++ b/src/util/pci.c
@@ -1046,6 +1046,14 @@ pciGetDevice(unsigned domain,
     snprintf(dev->path, sizeof(dev->path),
              PCI_SYSFS "devices/%s/config", dev->name);
 
+    if (access(dev->path, F_OK) != 0) {
+        virReportSystemError(errno,
+                             _("Device %s not found: could not access %s"),
+                             dev->name, dev->path);
+        pciFreeDevice(dev);
+        return NULL;
+    }
+
     vendor  = pciReadDeviceID(dev, "vendor");
     product = pciReadDeviceID(dev, "device");
 
-- 
1.6.6.1