linux-kernel - [PATCH 1/2] fpga: dfl: fme: fix return value check in in pr_mgmt

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Date:   Thu, 16 Aug 2018 14:42:13 -0500
From:   Alan Tull <atull@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Moritz Fischer <mdf@...nel.org>, Alan Tull <atull@...nel.org>,
        linux-kernel@...r.kernel.org, linux-fpga@...r.kernel.org,
        Wei Yongjun <weiyongjun1@...wei.com>
Subject: [PATCH 1/2] fpga: dfl: fme: fix return value check in in pr_mgmt_init()

From: Wei Yongjun <weiyongjun1@...wei.com>

In case of error, the function dfl_fme_create_region() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Fixes: 29de76240e86 ("fpga: dfl: fme: add partial reconfiguration sub feature support")
Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
Acked-by: Moritz Fischer <mdf@...nel.org>
Acked-by: Alan Tull <atull@...nel.org>
---
 drivers/fpga/dfl-fme-pr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/fpga/dfl-fme-pr.c b/drivers/fpga/dfl-fme-pr.c
index fc9fd2d..0b84053 100644
--- a/drivers/fpga/dfl-fme-pr.c
+++ b/drivers/fpga/dfl-fme-pr.c
@@ -420,7 +420,7 @@ static int pr_mgmt_init(struct platform_device *pdev,
 		/* Create region for each port */
 		fme_region = dfl_fme_create_region(pdata, mgr,
 						   fme_br->br, i);
-		if (!fme_region) {
+		if (IS_ERR(fme_region)) {
 			ret = PTR_ERR(fme_region);
 			goto destroy_region;
 		}
-- 
2.7.4