linux-kernel - [PATCH v3 14/15] staging: ccree: fix ifnullfree.cocci warnings

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Date:   Sun, 23 Apr 2017 12:26:22 +0300
From:   Gilad Ben-Yossef <gilad@...yossef.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org
Cc:     linux-crypto@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, gilad.benyossef@....com,
        Binoy Jayan <binoy.jayan@...aro.org>,
        Ofir Drang <ofir.drang@....com>,
        Stuart Yoder <stuart.yoder@....com>,
        Stephan Muller <smueller@...onox.de>,
        kbuild test robot <lkp@...el.com>,
        Fengguang Wu <fengguang.wu@...el.com>
Subject: [PATCH v3 14/15] staging: ccree: fix ifnullfree.cocci warnings

From: kbuild test robot <lkp@...el.com>

drivers/staging/ccree/ssi_buffer_mgr.c:530:3-19: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values.

 NULL check before some freeing functions is not needed.

 Based on checkpatch warning
 "kfree(NULL) is safe this check is probably not required"
 and kfreeaddr.cocci by Julia Lawall.

Generated by: scripts/coccinelle/free/ifnullfree.cocci

Signed-off-by: Gilad Ben-Yossef <gilad@...yossef.com>
Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
---
 drivers/staging/ccree/ssi_buffer_mgr.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/ccree/ssi_buffer_mgr.c b/drivers/staging/ccree/ssi_buffer_mgr.c
index af50904..038e2ff 100644
--- a/drivers/staging/ccree/ssi_buffer_mgr.c
+++ b/drivers/staging/ccree/ssi_buffer_mgr.c
@@ -1863,8 +1863,7 @@ int ssi_buffer_mgr_fini(struct ssi_drvdata *drvdata)
 	struct buff_mgr_handle *buff_mgr_handle = drvdata->buff_mgr_handle;
 
 	if (buff_mgr_handle  != NULL) {
-		if (buff_mgr_handle->mlli_buffs_pool != NULL)
-			dma_pool_destroy(buff_mgr_handle->mlli_buffs_pool);
+		dma_pool_destroy(buff_mgr_handle->mlli_buffs_pool);
 		kfree(drvdata->buff_mgr_handle);
 		drvdata->buff_mgr_handle = NULL;
 
-- 
2.1.4