Messages in this thread Patch in this message | | | From | Richard Weinberger <> | Subject | [PATCH 6/7] UBI: Fastmap: Make sure that find_wl_entry() never returns NULL | Date | Mon, 9 Jul 2012 14:18:42 +0200 |
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If the rbtree contains only one entry and we don't have fastmap on flash find_wl_entry() might return NULL. This must not happen.
Signed-off-by: Richard Weinberger <richard@nod.at> --- drivers/mtd/ubi/wl.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c index 79e3257..d61672d 100644 --- a/drivers/mtd/ubi/wl.c +++ b/drivers/mtd/ubi/wl.c @@ -376,7 +376,8 @@ static struct ubi_wl_entry *find_wl_entry(struct ubi_device *ubi, /* If no fastmap has been written and this WL entry can be used * as anchor PEB, hold it back and return the second best WL entry * such that fastmap can use the anchor PEB later. */ - if (!ubi->fm_disabled && !ubi->fm && e->pnum < UBI_FM_MAX_START) + if (prev_e && !ubi->fm_disabled && + !ubi->fm && e->pnum < UBI_FM_MAX_START) return prev_e; return e; -- 1.7.6.5
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