linux-kernel - [PATCH 4.5 27/87] nfc: st21nfca: Fix static checker warning

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

Message-Id: <20160530204934.419013928@linuxfoundation.org>
Date:	Mon, 30 May 2016 13:49:25 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
	Christophe Ricard <christophe-h.ricard@...com>,
	Samuel Ortiz <sameo@...ux.intel.com>
Subject: [PATCH 4.5 27/87] nfc: st21nfca: Fix static checker warning

4.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christophe Ricard <christophe.ricard@...il.com>

commit b58afe6d6d3a53af165d5946f12c4b08c95acd58 upstream.

Fix static checker warning:
drivers/nfc/st21nfca/i2c.c:530 st21nfca_hci_i2c_acpi_request_resources()
error: 'gpiod_ena' dereferencing possible ERR_PTR()

Fix so that if no enable gpio can be retrieved an -ENODEV is returned.

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Fixes: dfa8070d7f64 ("nfc: st21nfca: Add support for acpi probing for i2c device.")
Signed-off-by: Christophe Ricard <christophe-h.ricard@...com>
Signed-off-by: Samuel Ortiz <sameo@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/nfc/st21nfca/i2c.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/nfc/st21nfca/i2c.c
+++ b/drivers/nfc/st21nfca/i2c.c
@@ -524,8 +524,10 @@ static int st21nfca_hci_i2c_acpi_request
 	/* Get EN GPIO from ACPI */
 	gpiod_ena = devm_gpiod_get_index(dev, ST21NFCA_GPIO_NAME_EN, 1,
 					 GPIOD_OUT_LOW);
-	if (!IS_ERR(gpiod_ena))
-		phy->gpio_ena = desc_to_gpio(gpiod_ena);
+	if (!IS_ERR(gpiod_ena)) {
+		nfc_err(dev, "Unable to get ENABLE GPIO\n");
+		return -ENODEV;
+	}
 
 	phy->gpio_ena = desc_to_gpio(gpiod_ena);