From: Jean Delvare <khali@linux-fr.org>
Date: Fri, 10 Sep 2010 17:03:07 +0000 (-0300)
Subject: V4L/DVB: cx22702: Clean up register access functions
X-Git-Tag: staging/for_v2.6.37-rc1~370
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=24764107ec78230304811b11334090f65d1bc352;p=profile%2Fivi%2Fkernel-x86-ivi.git

V4L/DVB: cx22702: Clean up register access functions

* Avoid temporary variables.
* Optimize success paths.
* Make error messages consistently verbose.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/dvb/frontends/cx22702.c b/drivers/media/dvb/frontends/cx22702.c
index 00b5c7e..c799fdf 100644
--- a/drivers/media/dvb/frontends/cx22702.c
+++ b/drivers/media/dvb/frontends/cx22702.c
@@ -92,33 +92,36 @@ static int cx22702_writereg(struct cx22702_state *state, u8 reg, u8 data)
 
 	ret = i2c_transfer(state->i2c, &msg, 1);
 
-	if (ret != 1)
+	if (unlikely(ret != 1)) {
 		printk(KERN_ERR
 			"%s: error (reg == 0x%02x, val == 0x%02x, ret == %i)\n",
 			__func__, reg, data, ret);
+		return -1;
+	}
 
-	return (ret != 1) ? -1 : 0;
+	return 0;
 }
 
 static u8 cx22702_readreg(struct cx22702_state *state, u8 reg)
 {
 	int ret;
-	u8 b0[] = { reg };
-	u8 b1[] = { 0 };
+	u8 data;
 
 	struct i2c_msg msg[] = {
 		{ .addr = state->config->demod_address, .flags = 0,
-			.buf = b0, .len = 1 },
+			.buf = &reg, .len = 1 },
 		{ .addr = state->config->demod_address, .flags = I2C_M_RD,
-			.buf = b1, .len = 1 } };
+			.buf = &data, .len = 1 } };
 
 	ret = i2c_transfer(state->i2c, msg, 2);
 
-	if (ret != 2)
-		printk(KERN_ERR "%s: readreg error (ret == %i)\n",
-			__func__, ret);
+	if (unlikely(ret != 2)) {
+		printk(KERN_ERR "%s: error (reg == 0x%02x, ret == %i)\n",
+			__func__, reg, ret);
+		return 0;
+	}
 
-	return b1[0];
+	return data;
 }
 
 static int cx22702_set_inversion(struct cx22702_state *state, int inversion)