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: <1502461385-27564-6-git-send-email-thierry.escande@collabora.com>
Date:   Fri, 11 Aug 2017 16:23:02 +0200
From:   Thierry Escande <thierry.escande@...labora.com>
To:     Benson Leung <bleung@...omium.org>,
        Lee Jones <lee.jones@...aro.org>,
        Jonathan Cameron <jic23@...nel.org>
Cc:     Joseph Lo <josephl@...dia.com>,
        Gwendal Grignou <gwendal@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Daniel Hung-yu Wu <hywu@...gle.com>,
        Vincent Palatin <vpalatin@...omium.org>,
        Wei-Ning Huang <wnhuang@...gle.com>,
        linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org
Subject: [PATCH v2 5/8] mfd: cros_ec: fail early if we cannot identify the EC

From: Vincent Palatin <vpalatin@...omium.org>

If we cannot communicate with the EC chip to detect the protocol version
and its features, it's very likely useless to continue. Else we will
commit all kind of uninformed mistakes (using the wrong protocol, the
wrong buffer size, mixing the EC with other chips).

Signed-off-by: Vincent Palatin <vpalatin@...omium.org>
Signed-off-by: Thierry Escande <thierry.escande@...labora.com>
Acked-by: Benson Leung <bleung@...omium.org>
---
 drivers/mfd/cros_ec.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index b0ca5a4c..c5528ae 100644
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -112,7 +112,11 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 
 	mutex_init(&ec_dev->lock);
 
-	cros_ec_query_all(ec_dev);
+	err = cros_ec_query_all(ec_dev);
+	if (err) {
+		dev_err(dev, "Cannot identify the EC: error %d\n", err);
+		return err;
+	}
 
 	if (ec_dev->irq) {
 		err = request_threaded_irq(ec_dev->irq, NULL, ec_irq_thread,
-- 
2.7.4

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ