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UBI: add some more comments
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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@ -797,7 +797,7 @@ write_error:
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/*
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* ubi_eba_atomic_leb_change - change logical eraseblock atomically.
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* @ubi: UBI device description object
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* @vol: volume escription object
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* @vol: volume description object
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* @lnum: logical eraseblock number
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* @buf: data to write
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* @len: how many bytes to write
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@ -955,6 +955,12 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
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/*
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* We may race with volume deletion/re-size, so we have to hold
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* @ubi->volumes_lock.
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*
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* Note, it is not a problem if we race with volume deletion or re-size
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* here. If the volume is deleted or re-sized while we are moving an
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* eraseblock which belongs to this volume, we'll end up with finding
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* out that this LEB was unmapped at the end (see WL), and drop this
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* PEB.
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*/
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spin_lock(&ubi->volumes_lock);
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vol = ubi->volumes[idx];
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