lightnvm: pblk: fail gracefully on line alloc. failure

In the event of a line failing to allocate, fail gracefully and stop the
pipeline to avoid more write failing in the same place.

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

drivers/lightnvm/pblk-init.c

@@ -1047,6 +1047,11 @@ static int pblk_lines_init(struct pblk *pblk)
 		nr_free_chks += pblk_setup_line_meta(pblk, line, chunk_meta, i);
 	}
 
+	if (!nr_free_chks) {
+		pr_err("pblk: too many bad blocks prevent for sane instance\n");
+		return -EINTR;
+	}
+
 	pblk_set_provision(pblk, nr_free_chks);
 
 	kfree(chunk_meta);