linux-kernel - [PATCH] NFC: fdp: fix handling return value of fdp_nci_create

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Date:	Thu, 10 Dec 2015 08:53:02 +0100
From:	Andrzej Hajda <a.hajda@...sung.com>
To:	linux-wireless@...r.kernel.org (open list:NFC SUBSYSTEM)
Cc:	Andrzej Hajda <a.hajda@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Lauro Ramos Venancio <lauro.venancio@...nbossa.org>,
	Aloisio Almeida Jr <aloisio.almeida@...nbossa.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] NFC: fdp: fix handling return value of fdp_nci_create_conn

The function can return negative values, so its result should
be assigned to signed variable.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107

Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
---
 drivers/nfc/fdp/fdp.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/nfc/fdp/fdp.c b/drivers/nfc/fdp/fdp.c
index ccb07a1..440fac3 100644
--- a/drivers/nfc/fdp/fdp.c
+++ b/drivers/nfc/fdp/fdp.c
@@ -368,11 +368,10 @@ static int fdp_nci_patch_otp(struct nci_dev *ndev)
 		goto out;
 
 	/* Patch data connection creation */
-	conn_id = fdp_nci_create_conn(ndev);
-	if (conn_id < 0) {
-		r = conn_id;
+	r = fdp_nci_create_conn(ndev);
+	if (r < 0)
 		goto out;
-	}
+	conn_id = r;
 
 	/* Send the patch over the data connection */
 	r = fdp_nci_send_patch(ndev, conn_id, NCI_PATCH_TYPE_OTP);
@@ -439,11 +438,10 @@ static int fdp_nci_patch_ram(struct nci_dev *ndev)
 		goto out;
 
 	/* Patch data connection creation */
-	conn_id = fdp_nci_create_conn(ndev);
-	if (conn_id < 0) {
-		r = conn_id;
-		goto out;
-	}
+	r = fdp_nci_create_conn(ndev);
+	if (r < 0)
+		got out;
+	conn_id = r;
 
 	/* Send the patch over the data connection */
 	r = fdp_nci_send_patch(ndev, conn_id, NCI_PATCH_TYPE_RAM);
-- 
1.9.1

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