From: Javier González <jg@lightnvm.io>
Date: Wed, 3 May 2017 09:19:05 +0000 (+0200)
Subject: lightnvm: fix bad back free on error path
X-Git-Tag: v4.14-rc1~973^2~14
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=507f7d68fe5c24973dcd6e48f011bdfbd2197f01;p=platform%2Fkernel%2Flinux-rpi3.git

lightnvm: fix bad back free on error path

Free memory correctly when an allocation fails on a loop and we free
backwards previously successful allocations.

Signed-off-by: Javier González <javier@cnexlabs.com>
Reviewed-by: Matias Bjørling <matias@cnexlabs.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 54a06c3..6a4aa60 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -74,7 +74,7 @@ static int nvm_reserve_luns(struct nvm_dev *dev, int lun_begin, int lun_end)
 
 	return 0;
 err:
-	while (--i > lun_begin)
+	while (--i >= lun_begin)
 		clear_bit(i, dev->lun_map);
 
 	return -EBUSY;
@@ -211,7 +211,7 @@ static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev,
 
 	return tgt_dev;
 err_ch:
-	while (--i > 0)
+	while (--i >= 0)
 		kfree(dev_map->chnls[i].lun_offs);
 	kfree(luns);
 err_luns: