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[media] si4713: Bug fix for si4713_tx_tune_power() method in the i2c driver 

In the si4713_tx_tune_power() method, the args array element 'power'
can take values between SI4713_MIN_POWER and SI4713_MAX_POWER. power = 0
is also valid. All the values (0 > power < SI4713_MIN_POWER) are illegal
and hence are all mapped to SI4713_MIN_POWER.

Signed-off-by: Dinesh Ram <dinesh.ram@cern.ch>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Eduardo Valentin <edubezval@gmail.com>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Dinesh Ram 2013-10-15 12:24:40 -03:00 коммит произвёл Mauro Carvalho Chehab
Родитель d808f5bc72
Коммит e26fa6dccf
1 изменённых файлов: 8 добавлений и 8 удалений
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16
drivers/media/radio/si4713/si4713.c
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@ -555,14 +555,14 @@ static int si4713_tx_tune_freq(struct si4713_device *sdev, u16 frequency)
}
/*
* si4713_tx_tune_power - Sets the RF voltage level between 88 and 115 dBuV in
* si4713_tx_tune_power - Sets the RF voltage level between 88 and 120 dBuV in
* 1 dB units. A value of 0x00 indicates off. The command
* also sets the antenna tuning capacitance. A value of 0
* indicates autotuning, and a value of 1 - 191 indicates
* a manual override, which results in a tuning
* capacitance of 0.25 pF x @antcap.
* @sdev: si4713_device structure for the device we are communicating
* @power: tuning power (88 - 115 dBuV, unit/step 1 dB)
* @power: tuning power (88 - 120 dBuV, unit/step 1 dB)
* @antcap: value of antenna tuning capacitor (0 - 191)
*/
static int si4713_tx_tune_power(struct si4713_device *sdev, u8 power,
@ -576,16 +576,16 @@ static int si4713_tx_tune_power(struct si4713_device *sdev, u8 power,
* .Third byte = power
* .Fourth byte = antcap
*/
const u8 args[SI4713_TXPWR_NARGS] = {
u8 args[SI4713_TXPWR_NARGS] = {
0x00,
0x00,
power,
antcap,
};
if (((power > 0) && (power < SI4713_MIN_POWER)) ||
power > SI4713_MAX_POWER || antcap > SI4713_MAX_ANTCAP)
return -EDOM;
/* Map power values 1-87 to MIN_POWER (88) */
if (power > 0 && power < SI4713_MIN_POWER)
args[2] = power = SI4713_MIN_POWER;
err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_POWER,
args, ARRAY_SIZE(args), val,
@ -1462,9 +1462,9 @@ static int si4713_probe(struct i2c_client *client,
V4L2_CID_TUNE_PREEMPHASIS,
V4L2_PREEMPHASIS_75_uS, 0, V4L2_PREEMPHASIS_50_uS);
sdev->tune_pwr_level = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_TUNE_POWER_LEVEL, 0, 120, 1, DEFAULT_POWER_LEVEL);
V4L2_CID_TUNE_POWER_LEVEL, 0, SI4713_MAX_POWER, 1, DEFAULT_POWER_LEVEL);
sdev->tune_ant_cap = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_TUNE_ANTENNA_CAPACITOR, 0, 191, 1, 0);
V4L2_CID_TUNE_ANTENNA_CAPACITOR, 0, SI4713_MAX_ANTCAP, 1, 0);
if (hdl->error) {
rval = hdl->error;