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lightnvm: don't print a warning for ADDR_EMPTY

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Reading from ADDR_EMPTY is out of bounds.  The current code generates a
static checker warning because we check for out of bounds "lba" before
we check for ADDR_EMPTY, so the second check is always false.  It looks
like we intended ADDR_EMPTY to be a no-op without printing a warning.

Fixes: a4bd217b43 ("lightnvm: physical block device (pblk) target")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Dan Carpenter 2017-04-21 16:49:56 -06:00 committed by Jens Axboe
parent 5bf1e1ee62
commit 659226eb63
1 changed files with 3 additions and 3 deletions
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6
drivers/lightnvm/pblk-read.c
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@ -410,15 +410,15 @@ static int read_rq_gc(struct pblk *pblk, struct nvm_rq *rqd,
struct ppa_addr ppa;
int valid_secs = 0;
if (lba == ADDR_EMPTY)
goto out;
/* logic error: lba out-of-bounds */
if (lba >= pblk->rl.nr_secs) {
WARN(1, "pblk: read lba out of bounds\n");
goto out;
}
if (lba == ADDR_EMPTY)
goto out;
spin_lock(&pblk->trans_lock);
ppa = pblk_trans_map_get(pblk, lba);
spin_unlock(&pblk->trans_lock);