linux-kernel - [PATCH] RDS: IB: fix ifnullfree.cocci warnings

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Date:   Thu, 23 Feb 2017 20:47:01 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Santosh Shilimkar <santosh.shilimkar@...cle.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
        rds-devel@....oracle.com
Subject: [PATCH] RDS: IB: fix ifnullfree.cocci warnings

net/rds/ib.c:115:2-7: 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: Fengguang Wu <fengguang.wu@...el.com>
---

 ib.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/net/rds/ib.c
+++ b/net/rds/ib.c
@@ -111,8 +111,7 @@ static void rds_ib_dev_free(struct work_
 		kfree(i_ipaddr);
 	}

-	if (rds_ibdev->vector_load)
-		kfree(rds_ibdev->vector_load);
+	kfree(rds_ibdev->vector_load);

 	kfree(rds_ibdev);
 }