From: Matias Bjørling <m@bjorling.me>
Date: Mon, 16 Nov 2015 14:34:41 +0000 (+0100)
Subject: lightnvm: check for NAND flash and its type
X-Git-Tag: v4.4-rc3~26^2~25
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4264c980e3e9bb904b7f41dc9c64786cc5466bee;p=platform%2Fkernel%2Flinux-exynos.git

lightnvm: check for NAND flash and its type

Only NAND flash with SLC and MLC is supported. Make sure to not try to
initialize TLC memory or other non-volatile memory types.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index f659e60..0985a03 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -185,6 +185,16 @@ static int nvm_core_init(struct nvm_dev *dev)
 	dev->plane_mode = NVM_PLANE_SINGLE;
 	dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size;
 
+	if (grp->mtype != 0) {
+		pr_err("nvm: memory type not supported\n");
+		return -EINVAL;
+	}
+
+	if (grp->fmtype != 0 && grp->fmtype != 1) {
+		pr_err("nvm: flash type not supported\n");
+		return -EINVAL;
+	}
+
 	if (grp->mpos & 0x020202)
 		dev->plane_mode = NVM_PLANE_DOUBLE;
 	if (grp->mpos & 0x040404)