diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/tvaudio.c | 45 |
1 files changed, 37 insertions, 8 deletions
diff --git a/drivers/media/video/tvaudio.c b/drivers/media/video/tvaudio.c index 1387c54b7f0..6c920bf7497 100644 --- a/drivers/media/video/tvaudio.c +++ b/drivers/media/video/tvaudio.c @@ -1511,20 +1511,49 @@ static int chip_probe(struct i2c_client *client, const struct i2c_device_id *id) chip_cmd(chip,"init",&desc->init); if (desc->flags & CHIP_HAS_VOLUME) { - chip->left = desc->leftinit ? desc->leftinit : 65535; - chip->right = desc->rightinit ? desc->rightinit : 65535; - chip_write(chip,desc->leftreg,desc->volfunc(chip->left)); - chip_write(chip,desc->rightreg,desc->volfunc(chip->right)); + if (!desc->volfunc) { + /* This shouldn't be happen. Warn user, but keep working + without volume controls + */ + v4l_info(chip->c, "volume callback undefined!\n"); + desc->flags &= ~CHIP_HAS_VOLUME; + } else { + chip->left = desc->leftinit ? desc->leftinit : 65535; + chip->right = desc->rightinit ? desc->rightinit : 65535; + chip_write(chip, desc->leftreg, + desc->volfunc(chip->left)); + chip_write(chip, desc->rightreg, + desc->volfunc(chip->right)); + } } if (desc->flags & CHIP_HAS_BASSTREBLE) { - chip->treble = desc->trebleinit ? desc->trebleinit : 32768; - chip->bass = desc->bassinit ? desc->bassinit : 32768; - chip_write(chip,desc->bassreg,desc->bassfunc(chip->bass)); - chip_write(chip,desc->treblereg,desc->treblefunc(chip->treble)); + if (!desc->bassfunc || !desc->treblefunc) { + /* This shouldn't be happen. Warn user, but keep working + without bass/treble controls + */ + v4l_info(chip->c, "bass/treble callbacks undefined!\n"); + desc->flags &= ~CHIP_HAS_BASSTREBLE; + } else { + chip->treble = desc->trebleinit ? + desc->trebleinit : 32768; + chip->bass = desc->bassinit ? + desc->bassinit : 32768; + chip_write(chip, desc->bassreg, + desc->bassfunc(chip->bass)); + chip_write(chip, desc->treblereg, + desc->treblefunc(chip->treble)); + } } chip->thread = NULL; if (desc->flags & CHIP_NEED_CHECKMODE) { + if (!desc->getmode || !desc->setmode) { + /* This shouldn't be happen. Warn user, but keep working + without kthread + */ + v4l_info(chip->c, "set/get mode callbacks undefined!\n"); + return 0; + } /* start async thread */ init_timer(&chip->wt); chip->wt.function = chip_thread_wake; |