linux-kernel - [PATCH] fpga: fpga-mgr: remove unnecessary code in __fpga_mgr

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20171026230230.GA4904@embeddedor.com>
Date:   Thu, 26 Oct 2017 18:02:30 -0500
From:   "Gustavo A. R. Silva" <garsilva@...eddedor.com>
To:     Alan Tull <atull@...nel.org>, Moritz Fischer <mdf@...nel.org>
Cc:     linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <garsilva@...eddedor.com>
Subject: [PATCH] fpga: fpga-mgr: remove unnecessary code in __fpga_mgr_get

Notice that mgr = to_fpga_manager(dev); expands to:

mgr = container_of(dev, struct fpga_manager, dev);

and container_of is never null, so this null check is
unnecessary.

Addresses-Coverity-ID: 1397916
Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
---
 drivers/fpga/fpga-mgr.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
index 188ffef..33063ca 100644
--- a/drivers/fpga/fpga-mgr.c
+++ b/drivers/fpga/fpga-mgr.c
@@ -367,8 +367,6 @@ static struct fpga_manager *__fpga_mgr_get(struct device *dev)
 	int ret = -ENODEV;
 
 	mgr = to_fpga_manager(dev);
-	if (!mgr)
-		goto err_dev;
 
 	/* Get exclusive use of fpga manager */
 	if (!mutex_trylock(&mgr->ref_mutex)) {
-- 
2.7.4