linux-kernel - [PATCH 2/7] lightnvm: free memory when gennvm register fails

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Message-Id: <1448725768-11992-3-git-send-email-m@bjorling.me>
Date:	Sat, 28 Nov 2015 16:49:23 +0100
From:	Matias Bjørling <m@...rling.me>
To:	linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
	axboe@...com
Cc:	hch@...radead.org, keith.busch@...el.com,
	sudipm.mukherjee@...il.com, ww.tao0320@...il.com,
	Matias Bjørling <m@...rling.me>
Subject: [PATCH 2/7] lightnvm: free memory when gennvm register fails

From: Wenwei Tao <ww.tao0320@...il.com>

free allocated nvm block and gennvm lun structures when
gennvm register fails, otherwise it will cause memory leak.

Signed-off-by: Matias Bjørling <m@...rling.me>
---
 drivers/lightnvm/gennvm.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index e20e74e..3969a98 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -207,6 +207,14 @@ static int gennvm_blocks_init(struct nvm_dev *dev, struct gen_nvm *gn)
 	return 0;
 }
 
+static void gennvm_free(struct nvm_dev *dev)
+{
+	gennvm_blocks_free(dev);
+	gennvm_luns_free(dev);
+	kfree(dev->mp);
+	dev->mp = NULL;
+}
+
 static int gennvm_register(struct nvm_dev *dev)
 {
 	struct gen_nvm *gn;
@@ -234,16 +242,13 @@ static int gennvm_register(struct nvm_dev *dev)
 
 	return 1;
 err:
-	kfree(gn);
+	gennvm_free(dev);
 	return ret;
 }
 
 static void gennvm_unregister(struct nvm_dev *dev)
 {
-	gennvm_blocks_free(dev);
-	gennvm_luns_free(dev);
-	kfree(dev->mp);
-	dev->mp = NULL;
+	gennvm_free(dev);
 }
 
 static struct nvm_block *gennvm_get_blk(struct nvm_dev *dev,
-- 
2.1.4

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