On 22.01.2012 22:13, Gordon Hecker wrote:
> The i2c failures were caused by enabling both i2c gates
> at the same time while putting the tuners asleep.
>
> This patch removes the init() and sleep() callbacks from the tuner,
> to prevent frontend.c from calling
> i2c_gate_ctrl
> tuner init / sleep
> i2c_gate_ctrl
> without holding the lock.
> tuner init() and sleep() are instead called in frontend init() and
> sleep().
>
> Signed-off-by: Gordon Hecker <ghecker@xxxxxx>
> ---
> drivers/media/dvb/dvb-usb/af9015.c | 31 +++++++++++++++++++++++++++++++
> drivers/media/dvb/dvb-usb/af9015.h | 2 ++
> 2 files changed, 33 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/media/dvb/dvb-usb/af9015.c b/drivers/media/dvb/dvb-usb/af9015.c
> index e755d76..b69b43b 100644
> --- a/drivers/media/dvb/dvb-usb/af9015.c
> +++ b/drivers/media/dvb/dvb-usb/af9015.c
> @@ -1141,7 +1141,18 @@ static int af9015_af9013_init(struct dvb_frontend *fe)
> return -EAGAIN;
>
> ret = priv->init[adap->id](fe);
> + if (ret)
> + goto err_unlock;
> +
> + if (priv->tuner_ops_init[adap->id]) {
> + if (fe->ops.i2c_gate_ctrl)
> + fe->ops.i2c_gate_ctrl(fe, 1);
> + ret = priv->tuner_ops_init[adap->id](fe);
> + if (fe->ops.i2c_gate_ctrl)
> + fe->ops.i2c_gate_ctrl(fe, 0);
> + }
>
> +err_unlock:
> mutex_unlock(&adap->dev->usb_mutex);
>
> return ret;
> @@ -1157,8 +1168,19 @@ static int af9015_af9013_sleep(struct dvb_frontend *fe)
> if (mutex_lock_interruptible(&adap->dev->usb_mutex))
> return -EAGAIN;
>
> + if (priv->tuner_ops_sleep[adap->id]) {
> + if (fe->ops.i2c_gate_ctrl)
> + fe->ops.i2c_gate_ctrl(fe, 1);
> + ret = priv->tuner_ops_sleep[adap->id](fe);
> + if (fe->ops.i2c_gate_ctrl)
> + fe->ops.i2c_gate_ctrl(fe, 0);
> + if (ret)
> + goto err_unlock;
> + }
> +
> ret = priv->sleep[adap->id](fe);
>
> +err_unlock:
> mutex_unlock(&adap->dev->usb_mutex);
>
> return ret;
> @@ -1283,6 +1305,7 @@ static struct mxl5007t_config af9015_mxl5007t_config = {
> static int af9015_tuner_attach(struct dvb_usb_adapter *adap)
> {
> int ret;
> + struct af9015_state *state = adap->dev->priv;
> deb_info("%s:\n", __func__);
>
> switch (af9015_af9013_config[adap->id].tuner) {
> @@ -1340,6 +1363,14 @@ static int af9015_tuner_attach(struct dvb_usb_adapter *adap)
> err("Unknown tuner id:%d",
> af9015_af9013_config[adap->id].tuner);
> }
> +
> + state->tuner_ops_sleep[adap->id] =
> + adap->fe_adap[0].fe->ops.tuner_ops.sleep;
> + adap->fe_adap[0].fe->ops.tuner_ops.sleep = 0;
> +
> + state->tuner_ops_init[adap->id] =
> + adap->fe_adap[0].fe->ops.tuner_ops.init;
> + adap->fe_adap[0].fe->ops.tuner_ops.init = 0;
> return ret;
> }
>
> diff --git a/drivers/media/dvb/dvb-usb/af9015.h b/drivers/media/dvb/dvb-usb/af9015.h
> index f619063..ee2ec5b 100644
> --- a/drivers/media/dvb/dvb-usb/af9015.h
> +++ b/drivers/media/dvb/dvb-usb/af9015.h
> @@ -108,6 +108,8 @@ struct af9015_state {
> int (*read_status[2]) (struct dvb_frontend *fe, fe_status_t *status);
> int (*init[2]) (struct dvb_frontend *fe);
> int (*sleep[2]) (struct dvb_frontend *fe);
> + int (*tuner_ops_init[2]) (struct dvb_frontend *fe);
> + int (*tuner_ops_sleep[2]) (struct dvb_frontend *fe);
> };
>
> struct af9015_config {
Both tuners perform stable.
Tested on mythbackend multiple streams simultaneously.
+1
rgds,
poma
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