linux-kernel - [PATCH] drivers: crypto: fix ifnullfree.cocci warnings

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Message-ID: <20170112133857.GA56852@cairo.lkp.intel.com>
Date:   Thu, 12 Jan 2017 21:38:58 +0800
From:   kbuild test robot <lkp@...el.com>
To:     George Cherian <george.cherian@...ium.com>
Cc:     kbuild-all@...org, herbert@...dor.apana.org.au,
        davem@...emloft.net, david.daney@...ium.com,
        clabbe.montjoie@...il.com, linux-kernel@...r.kernel.org,
        linux-crypto@...r.kernel.org,
        George Cherian <george.cherian@...ium.com>
Subject: [PATCH] drivers: crypto: fix ifnullfree.cocci warnings

drivers/crypto/cavium/cpt/cptvf_reqmanager.c:312:2-8: 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.
drivers/crypto/cavium/cpt/cptvf_reqmanager.c:315:2-8: 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.
drivers/crypto/cavium/cpt/cptvf_reqmanager.c:318:2-8: 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.
drivers/crypto/cavium/cpt/cptvf_reqmanager.c:321:2-8: 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

CC: George Cherian <george.cherian@...ium.com>
Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
---

 cptvf_reqmanager.c |   12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

--- a/drivers/crypto/cavium/cpt/cptvf_reqmanager.c
+++ b/drivers/crypto/cavium/cpt/cptvf_reqmanager.c
@@ -308,17 +308,13 @@ void do_request_cleanup(struct cpt_vf *c
 		}
 	}

-	if (info->scatter_components)
-		kzfree(info->scatter_components);
+	kzfree(info->scatter_components);

-	if (info->gather_components)
-		kzfree(info->gather_components);
+	kzfree(info->gather_components);

-	if (info->out_buffer)
-		kzfree(info->out_buffer);
+	kzfree(info->out_buffer);

-	if (info->in_buffer)
-		kzfree(info->in_buffer);
+	kzfree(info->in_buffer);

 	if (info->completion_addr)
 		kzfree((void *)info->completion_addr);