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  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]
Date:	Mon, 16 Jun 2014 14:39:59 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Andrew Bresticker <abrestic@...omium.org>, swarren@...dotorg.org,
	olof@...om.net, Sonny Rao <sonnyrao@...omium.org>,
	linux-samsung-soc@...r.kernel.org,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Bill Richardson <wfrichar@...omium.org>, sjg@...omium.org,
	Wolfram Sang <wsa@...-dreams.de>, broonie@...nel.org,
	Doug Anderson <dianders@...omium.org>, sameo@...ux.intel.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH 09/10] mfd: cros_ec: Check result code from EC messages

From: Bill Richardson <wfrichar@...omium.org>

Just because the host was able to talk to the EC doesn't mean that the EC
was happy with what it was told. Errors in communincation are not the same
as error messages from the EC itself.

This change lets the EC report its errors separately.

Signed-off-by: Bill Richardson <wfrichar@...omium.org>
Signed-off-by: Doug Anderson <dianders@...omium.org>
---
 drivers/mfd/cros_ec_i2c.c | 15 +++++++++++----
 drivers/mfd/cros_ec_spi.c | 26 ++++++++++++++------------
 2 files changed, 25 insertions(+), 16 deletions(-)

diff --git a/drivers/mfd/cros_ec_i2c.c b/drivers/mfd/cros_ec_i2c.c
index 5bb32f5..2276096 100644
--- a/drivers/mfd/cros_ec_i2c.c
+++ b/drivers/mfd/cros_ec_i2c.c
@@ -92,11 +92,18 @@ static int cros_ec_cmd_xfer_i2c(struct cros_ec_device *ec_dev,
 	}
 
 	/* check response error code */
-	if (i2c_msg[1].buf[0]) {
-		dev_warn(ec_dev->dev, "command 0x%02x returned an error %d\n",
-			 msg->command, i2c_msg[1].buf[0]);
-		ret = -EINVAL;
+	msg->result = i2c_msg[1].buf[0];
+	switch (msg->result) {
+	case EC_RES_SUCCESS:
+		break;
+	case EC_RES_IN_PROGRESS:
+		ret = -EAGAIN;
+		dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",
+			msg->command);
 		goto done;
+	default:
+		dev_warn(ec_dev->dev, "command 0x%02x returned %d\n",
+			 msg->command, msg->result);
 	}
 
 	/* copy response packet payload and compute checksum */
diff --git a/drivers/mfd/cros_ec_spi.c b/drivers/mfd/cros_ec_spi.c
index 09ca789..4d34f1c 100644
--- a/drivers/mfd/cros_ec_spi.c
+++ b/drivers/mfd/cros_ec_spi.c
@@ -289,21 +289,23 @@ static int cros_ec_cmd_xfer_spi(struct cros_ec_device *ec_dev,
 		goto exit;
 	}
 
-	/* check response error code */
 	ptr = ec_dev->din;
-	if (ptr[0]) {
-		if (ptr[0] == EC_RES_IN_PROGRESS) {
-			dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",
-				ec_msg->command);
-			ret = -EAGAIN;
-			goto exit;
-		}
-		dev_warn(ec_dev->dev, "command 0x%02x returned an error %d\n",
-			 ec_msg->command, ptr[0]);
-		debug_packet(ec_dev->dev, "in_err", ptr, len);
-		ret = -EINVAL;
+
+	/* check response error code */
+	ec_msg->result = ptr[0];
+	switch (ec_msg->result) {
+	case EC_RES_SUCCESS:
+		break;
+	case EC_RES_IN_PROGRESS:
+		ret = -EAGAIN;
+		dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",
+			ec_msg->command);
 		goto exit;
+	default:
+		dev_warn(ec_dev->dev, "command 0x%02x returned %d\n",
+			 ec_msg->command, ec_msg->result);
 	}
+
 	len = ptr[1];
 	sum = ptr[0] + ptr[1];
 	if (len > ec_msg->insize) {
-- 
2.0.0.526.g5318336

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists