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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-01-24 16:56:14 +0100
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-01-25 15:41:25 +0100
commit60c031531a85b3580f66c2530f9b2802adcad4df (patch)
treef3d9211a948233f23f8e193af951776024d6aa29 /drivers/mtd/ubi/eba.c
parentUBI: simplify internal interfaces (diff)
downloadlinux-60c031531a85b3580f66c2530f9b2802adcad4df.tar.xz
linux-60c031531a85b3580f66c2530f9b2802adcad4df.zip
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>
Diffstat (limited to 'drivers/mtd/ubi/eba.c')
-rw-r--r--drivers/mtd/ubi/eba.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index 1f7375e2ffb8..7ce91ca742b1 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -862,6 +862,17 @@ int ubi_eba_atomic_leb_change(struct ubi_device *ubi, struct ubi_volume *vol,
if (ubi->ro_mode)
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);
if (!vid_hdr)
return -ENOMEM;