Frantisek Sumsal
cd37793d28
8a088877ab uncovered a missing `udevadm
settle` in the multipath test case, causing the test to occasionally
fail with:
```
[ 41.718617] testsuite-64.sh[806]: + for i in {0..63}
[ 41.727917] systemd-udevd[1120]: sdhf: /usr/lib/udev/rules.d/60-persistent-storage.rules:66 Importing properties from results of 'scsi_id --export --whitelisted -d /dev/sdhf'
[ 41.728668] testsuite-64.sh[2341]: ++ printf %.4d 1
[ 41.733851] systemd-udevd[1415]: sdhc: Adding watch on '/dev/sdhc'
[ 41.734477] testsuite-64.sh[806]: + wwid=deaddeadbeef0001
[ 41.734477] testsuite-64.sh[806]: + path=/dev/disk/by-id/wwn-0xdeaddeadbeef0001
[ 41.746174] systemd-udevd[1409]: sdhb: 'scsi_id --export --whitelisted -d /dev/sdhb'(out) 'ID_MODEL_ENC=QEMU\x20HARDDISK\x20\x20\x20'
[ 41.747058] testsuite-64.sh[2342]: ++ readlink -f /dev/disk/by-id/wwn-0xdeaddeadbeef0001
[ 41.755512] testsuite-64.sh[806]: + dmpath=/dev/sdi
[ 41.755512] testsuite-64.sh[806]: + lsblk /dev/disk/by-id/wwn-0xdeaddeadbeef0001
[ 41.766884] systemd-udevd[1402]: sdhd: 'scsi_id --export --whitelisted -d /dev/sdhd'(out) 'ID_VENDOR=QEMU'
[ 41.767532] testsuite-64.sh[2343]: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
[ 41.767532] testsuite-64.sh[2343]: sdi 8:128 0 512B 0 disk
[ 41.779219] systemd-udevd[1400]: dm-33: 'kpartx_id 254 33 mpath-3deaddeadbeef0051'(out) 'DM_WWN=0xdeaddeadbeef0051'
[ 41.779902] testsuite-64.sh[806]: + multipath -C /dev/sdi
[ 41.785296] systemd-udevd[1414]: dm-31: Device processed (SEQNUM=4839, ACTION=change)
[ 41.785925] testsuite-64.sh[2344]: 37.658168 | /dev/sdi is not a dm device
```
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