linux-kernel - [PATCH] crypto: ccp - add missing release in ccp_dmaengine

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Date:   Fri,  2 Sep 2016 11:48:53 +0200
From:   Quentin Lambert <lambert.quentin@...il.com>
To:     Tom Lendacky <thomas.lendacky@....com>,
        Gary Hook <gary.hook@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org,
        Quentin Lambert <lambert.quentin@...il.com>
Subject: [PATCH] crypto: ccp - add missing release in ccp_dmaengine_register 

ccp_dmaengine_register used to return with an error code before
releasing all resource. This patch adds a jump to the appropriate label
ensuring that the resources are properly released before returning.

This issue was found with Hector.

Signed-off-by: Quentin Lambert <lambert.quentin@...il.com>
---
 drivers/crypto/ccp/ccp-dmaengine.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/drivers/crypto/ccp/ccp-dmaengine.c
+++ b/drivers/crypto/ccp/ccp-dmaengine.c
@@ -650,8 +650,11 @@ int ccp_dmaengine_register(struct ccp_de
 	dma_desc_cache_name = devm_kasprintf(ccp->dev, GFP_KERNEL,
 					     "%s-dmaengine-desc-cache",
 					     ccp->name);
-	if (!dma_cmd_cache_name)
-		return -ENOMEM;
+	if (!dma_cmd_cache_name) {
+		ret = -ENOMEM;
+		goto err_cache;
+	}
+
 	ccp->dma_desc_cache = kmem_cache_create(dma_desc_cache_name,
 						sizeof(struct ccp_dma_desc),
 						sizeof(void *),