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udev: only report a warning if udev_enumerate_scan_devices fails

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Even if an error is reported by `udev_enumerate_scan_devices`,
e.g. because a driver of a device has an bug, we can still enumerate
all other devices. Additionally the documentation of
udev_enumerate_scan_devices says that on success an integer >= 0 is
returned (see man udev_enumerate_scan_devices(3)).

Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
This commit is contained in:
Marc Hartmayer 2019-02-14 10:01:01 +01:00 committed by John Ferlan
parent 0f110d5ac8
commit 4c4ff7a1a0
1 changed files with 3 additions and 7 deletions
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10
src/node_device/node_device_udev.c
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@ -1480,13 +1480,8 @@ udevEnumerateDevices(struct udev *udev)
if (udevEnumerateAddMatches(udev_enumerate) < 0)
goto cleanup;
ret = udev_enumerate_scan_devices(udev_enumerate);
if (ret != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("udev scan devices returned %d"),
ret);
goto cleanup;
}
if (udev_enumerate_scan_devices(udev_enumerate) < 0)
VIR_WARN("udev scan devices failed");
udev_list_entry_foreach(list_entry,
udev_enumerate_get_list_entry(udev_enumerate)) {
@ -1494,6 +1489,7 @@ udevEnumerateDevices(struct udev *udev)
udevProcessDeviceListEntry(udev, list_entry);
}
ret = 0;
cleanup:
udev_enumerate_unref(udev_enumerate);
return ret;