From: Javier González <jg@lightnvm.io>
Date: Fri, 30 Jun 2017 15:56:41 +0000 (+0200)
Subject: lightnvm: pblk: add initialization check
X-Git-Tag: v4.13-rc1~212^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b5e063a2861a3af00fe3770e5fb85f936facbf42;p=platform%2Fkernel%2Flinux-exynos.git

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>
---

diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index 025d8fe..1b0f612 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)