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libudev: conserve previous behavior
The commit dcfbde3a43
changes
sd_device_get_ifindex() returns -ENOENT instead of zero if the device
does not have ifindex.
Let's keep the original behavior of udev_device_get_ifindex().
Fixes #10699.
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@ -52,6 +52,8 @@ int udev_device_get_ifindex(struct udev_device *udev_device) {
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assert(udev_device);
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r = sd_device_get_ifindex(udev_device->device, &ifindex);
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if (r == -ENOENT)
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return 0;
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if (r < 0)
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return r;
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