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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>
This commit is contained in:
Jean Delvare 2010-09-10 14:03:07 -03:00 committed by Mauro Carvalho Chehab
parent a0a4714c40
commit 24764107ec
1 changed files with 13 additions and 10 deletions
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23
drivers/media/dvb/frontends/cx22702.c
View File

@ -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)