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UBI: fix error path in __wl_get_peb 

In case of an error (if there are not free PEB's for example),
__wl_get_peb will return a negative value. In order to prevent access
violation we need to test the returned value prior to using it later on.

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
Reviewed-by: Dolev Raviv <draviv@codeaurora.org>
Acked-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
This commit is contained in:
Tanya Brokhman 2014-04-01 11:01:12 +03:00 committed by Artem Bityutskiy
parent fcdd57c890
commit 87ed89d21e
1 changed files with 3 additions and 0 deletions
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3
drivers/mtd/ubi/wl.c
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@ -684,6 +684,9 @@ int ubi_wl_get_peb(struct ubi_device *ubi)
peb = __wl_get_peb(ubi);
spin_unlock(&ubi->wl_lock);
if (peb < 0)
return peb;
err = ubi_self_check_all_ff(ubi, peb, ubi->vid_hdr_aloffset,
ubi->peb_size - ubi->vid_hdr_aloffset);
if (err) {