free_msi_virqs(dev);
}
-static void assign_failed_examine(AssignedDevice *dev)
+/* This function tries to determine the cause of the PCI assignment failure. It
+ * always returns the cause as a dynamically allocated, human readable string.
+ * If the function fails to determine the cause for any internal reason, then
+ * the returned string will state that fact.
+ */
+static char *assign_failed_examine(const AssignedDevice *dev)
{
char name[PATH_MAX], dir[PATH_MAX], driver[PATH_MAX] = {}, *ns;
uint16_t vendor_id, device_id;
goto fail;
}
- error_printf("*** The driver '%s' is occupying your device "
- "%04x:%02x:%02x.%x.\n"
+ return g_strdup_printf(
+ "*** The driver '%s' is occupying your device %04x:%02x:%02x.%x.\n"
"***\n"
"*** You can try the following commands to free it:\n"
"***\n"
ns, dev->host.domain, dev->host.bus, dev->host.slot,
dev->host.function, vendor_id, device_id);
- return;
-
fail:
- error_report("Couldn't find out why.");
+ return g_strdup("Couldn't find out why.");
}
static int assign_device(AssignedDevice *dev)
r = kvm_device_pci_assign(kvm_state, &dev->host, flags, &dev->dev_id);
if (r < 0) {
- error_report("Failed to assign device \"%s\" : %s",
- dev->dev.qdev.id, strerror(-r));
-
switch (r) {
- case -EBUSY:
- assign_failed_examine(dev);
+ case -EBUSY: {
+ char *cause;
+
+ cause = assign_failed_examine(dev);
+ error_report("Failed to assign device \"%s\" : %s\n%s",
+ dev->dev.qdev.id, strerror(-r), cause);
+ g_free(cause);
break;
+ }
default:
+ error_report("Failed to assign device \"%s\" : %s",
+ dev->dev.qdev.id, strerror(-r));
break;
}
}