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devmapper: Fix UnmountDevice for non-existing device

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Properly error out if passed an id that doesn't exist.

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)
This commit is contained in:
Alexander Larsson 2014-02-06 22:26:09 +01:00
parent 2c82fd93d8
commit 304e33a2fe
1 changed files with 3 additions and 0 deletions
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3
graphdriver/devmapper/deviceset.go
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@ -847,6 +847,9 @@ func (devices *DeviceSet) UnmountDevice(hash string, mode UnmountMode) error {
defer devices.Unlock()
info := devices.Devices[hash]
if info == nil {
return fmt.Errorf("UnmountDevice: no such device %s\n", hash)
}
if mode == UnmountFloat {
if info.floating {