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UBI: handle zero-length case

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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>
This commit is contained in:
Artem Bityutskiy
2008-01-24 17:56:14 +02:00
parent 1b68d0eea5
commit 60c031531a
1 changed files with 11 additions and 0 deletions
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11
drivers/mtd/ubi/eba.c
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@@ -862,6 +862,17 @@ int ubi_eba_atomic_leb_change(struct ubi_device *ubi, struct ubi_volume *vol,
if (ubi->ro_mode) if (ubi->ro_mode)
return -EROFS; return -EROFS;
if (len == 0) {
/*
* Special case when data length is zero. In this case the LEB
* has to be unmapped and mapped somewhere else.
*/
err = ubi_eba_unmap_leb(ubi, vol, lnum);
if (err)
return err;
return ubi_eba_write_leb(ubi, vol, lnum, NULL, 0, 0, dtype);
}
vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS); vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
if (!vid_hdr) if (!vid_hdr)
return -ENOMEM; return -ENOMEM;