linux-kernel - [PATCH] staging: ccree: Fix unnecessary NULL check before kfree'ing it

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Date:   Thu, 20 Jul 2017 19:07:07 +0530
From:   sunil.m@...hveda.org
To:     gregkh@...uxfoundation.org, gilad@...yossef.com
Cc:     linux-crypto@...r.kernel.org,
        driverdev-devel@...uxdriverproject.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, Suniel Mahesh <sunil.m@...hveda.org>
Subject: [PATCH] staging: ccree: Fix unnecessary NULL check before kfree'ing it

From: Suniel Mahesh <sunil.m@...hveda.org>

kfree(NULL) is safe and their is no need for a NULL check. Pointed out
by checkpatch.

Signed-off-by: Suniel Mahesh <sunil.m@...hveda.org>
---
Note:
- Patch was compile tested and built(ARCH=arm) on next-20170719.
  No build issues reported.
---
 drivers/staging/ccree/ssi_hash.c | 25 ++++++++-----------------
 1 file changed, 8 insertions(+), 17 deletions(-)

diff --git a/drivers/staging/ccree/ssi_hash.c b/drivers/staging/ccree/ssi_hash.c
index fba0643..b080aed 100644
--- a/drivers/staging/ccree/ssi_hash.c
+++ b/drivers/staging/ccree/ssi_hash.c
@@ -296,20 +296,14 @@ static int ssi_hash_map_request(struct device *dev,
 fail1:
 	 kfree(state->digest_buff);
 fail_digest_result_buff:
-	 if (state->digest_result_buff) {
-		 kfree(state->digest_result_buff);
-	     state->digest_result_buff = NULL;
-	 }
+	kfree(state->digest_result_buff);
+	state->digest_result_buff = NULL;
 fail_buff1:
-	 if (state->buff1) {
-		 kfree(state->buff1);
-	     state->buff1 = NULL;
-	 }
+	kfree(state->buff1);
+	state->buff1 = NULL;
 fail_buff0:
-	 if (state->buff0) {
-		 kfree(state->buff0);
-	     state->buff0 = NULL;
-	 }
+	kfree(state->buff0);
+	state->buff0 = NULL;
 fail0:
 	return rc;
 }
@@ -2319,11 +2313,8 @@ int ssi_hash_alloc(struct ssi_drvdata *drvdata)
 	return 0;
 
 fail:
-
-	if (drvdata->hash_handle) {
-		kfree(drvdata->hash_handle);
-		drvdata->hash_handle = NULL;
-	}
+	kfree(drvdata->hash_handle);
+	drvdata->hash_handle = NULL;
 	return rc;
 }
 
-- 
1.9.1