From a81df363554fb6439b5eb4ada06ad546a1df5ce3 Mon Sep 17 00:00:00 2001 From: Michael Krufky Date: Tue, 22 Apr 2008 14:45:52 -0300 Subject: [PATCH] V4L/DVB (7348): tuner-simple: do not send i2c commands if there is no i2c adapter if (priv->i2c_props.adap == NULL) then exit any function that would send commands over the i2c bus. We allow drivers to attach without an i2c adapter for cases where the dvb demod accesses the tuner directly via calc_regs. Signed-off-by: Michael Krufky Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/tuner-simple.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/media/video/tuner-simple.c b/drivers/media/video/tuner-simple.c index d6d922c32bc..3ec76391a60 100644 --- a/drivers/media/video/tuner-simple.c +++ b/drivers/media/video/tuner-simple.c @@ -149,7 +149,12 @@ static inline int tuner_afcstatus(const int status) static int simple_get_status(struct dvb_frontend *fe, u32 *status) { struct tuner_simple_priv *priv = fe->tuner_priv; - int tuner_status = tuner_read_status(fe); + int tuner_status; + + if (priv->i2c_props.adap == NULL) + return -EINVAL; + + tuner_status = tuner_read_status(fe); *status = 0; @@ -166,7 +171,12 @@ static int simple_get_status(struct dvb_frontend *fe, u32 *status) static int simple_get_rf_strength(struct dvb_frontend *fe, u16 *strength) { struct tuner_simple_priv *priv = fe->tuner_priv; - int signal = tuner_signal(tuner_read_status(fe)); + int signal; + + if (priv->i2c_props.adap == NULL) + return -EINVAL; + + signal = tuner_signal(tuner_read_status(fe)); *strength = signal; @@ -685,6 +695,9 @@ static int simple_set_params(struct dvb_frontend *fe, struct tuner_simple_priv *priv = fe->tuner_priv; int ret = -EINVAL; + if (priv->i2c_props.adap == NULL) + return -EINVAL; + switch (params->mode) { case V4L2_TUNER_RADIO: ret = simple_set_radio_freq(fe, params); -- 2.41.0