sd-device: try to get DISKSEQ from uevent file

Otherwise, if the sd-device object is created from e.g. syspath, then
sd_device_get_diskseq() returns -ENOENT.

diff --git a/src/libsystemd/sd-device/sd-device.c b/src/libsystemd/sd-device/sd-device.c
index e7d398dbb0acb7c11bf2f04eda54f36d7c028085..545a0f5a5d763158645914dda64584e37ed34b94 100644 (file)
--- a/src/libsystemd/sd-device/sd-device.c
+++ b/src/libsystemd/sd-device/sd-device.c
@@ -1138,8 +1138,14 @@ _public_ int sd_device_get_seqnum(sd_device *device, uint64_t *ret) {
 }
 
 _public_ int sd_device_get_diskseq(sd_device *device, uint64_t *ret) {
+        int r;
+
         assert_return(device, -EINVAL);
 
+        r = device_read_uevent_file(device);
+        if (r < 0)
+                return r;
+
         if (device->diskseq == 0)
                 return -ENOENT;