From: Benjamin Larsson <benjamin@southpole.se>
Date: Sun, 15 Mar 2015 22:57:52 +0000 (-0300)
Subject: [media] mn88473: implement firmware parity check
X-Git-Tag: v4.1-rc1~59^2~1^2~129
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=0f21ac7f92e8a014a3c653337fbae7af4c240c3a;p=linux.git

[media] mn88473: implement firmware parity check

Signed-off-by: Benjamin Larsson <benjamin@southpole.se>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
---

diff --git a/drivers/staging/media/mn88473/mn88473.c b/drivers/staging/media/mn88473/mn88473.c
index 84bd4fa3c627..607ce4d3b12f 100644
--- a/drivers/staging/media/mn88473/mn88473.c
+++ b/drivers/staging/media/mn88473/mn88473.c
@@ -192,6 +192,7 @@ static int mn88473_init(struct dvb_frontend *fe)
 	int ret, len, remaining;
 	const struct firmware *fw = NULL;
 	u8 *fw_file = MN88473_FIRMWARE;
+	unsigned int tmp;
 
 	dev_dbg(&client->dev, "\n");
 
@@ -227,6 +228,20 @@ static int mn88473_init(struct dvb_frontend *fe)
 		}
 	}
 
+	/* parity check of firmware */
+	ret = regmap_read(dev->regmap[0], 0xf8, &tmp);
+	if (ret) {
+		dev_err(&client->dev,
+				"parity reg read failed=%d\n", ret);
+		goto err;
+	}
+	if (tmp & 0x10) {
+		dev_err(&client->dev,
+				"firmware parity check failed=0x%x\n", tmp);
+		goto err;
+	}
+	dev_err(&client->dev, "firmware parity check succeeded=0x%x\n", tmp);
+
 	ret = regmap_write(dev->regmap[0], 0xf5, 0x00);
 	if (ret)
 		goto err;