lightnvm: pblk: add initialization check

Add a sanity check to the pblk initialization sequence in order to
ensure that enough LUNs have been allocated to store the line metadata.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index 025d8fe52154..1b0f61233c21 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -716,6 +716,12 @@ add_emeta_page:
         lm->emeta_bb = geo->nr_luns - i;
         lm->min_blk_line = 1 + DIV_ROUND_UP(lm->smeta_sec + lm->emeta_sec[0],
                                                         geo->sec_per_blk);
+        if (lm->min_blk_line > lm->blk_per_line) {
+                pr_err("pblk: config. not supported. Min. LUN in line:%d\n",
+                                                        lm->blk_per_line);
+                ret = -EINVAL;
+                goto fail;
+        }
 
         ret = pblk_lines_alloc_metadata(pblk);
         if (ret)