UBI: handle zero-length case
ubi_eba_atomic_leb_change() has to just map the LEB to a free PEB if data length is zero. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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@ -862,6 +862,17 @@ int ubi_eba_atomic_leb_change(struct ubi_device *ubi, struct ubi_volume *vol,
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if (ubi->ro_mode)
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return -EROFS;
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if (len == 0) {
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/*
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* Special case when data length is zero. In this case the LEB
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* has to be unmapped and mapped somewhere else.
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*/
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err = ubi_eba_unmap_leb(ubi, vol, lnum);
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if (err)
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return err;
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return ubi_eba_write_leb(ubi, vol, lnum, NULL, 0, 0, dtype);
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}
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vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
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if (!vid_hdr)
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return -ENOMEM;
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