diff options
| -rw-r--r-- | drivers/media/dvb/frontends/au8522_dig.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/media/dvb/frontends/au8522_dig.c b/drivers/media/dvb/frontends/au8522_dig.c index b04346687c68..7e24b914dbe5 100644 --- a/drivers/media/dvb/frontends/au8522_dig.c +++ b/drivers/media/dvb/frontends/au8522_dig.c @@ -34,6 +34,7 @@ static int debug; /* Despite the name "hybrid_tuner", the framework works just as well for hybrid demodulators as well... */ static LIST_HEAD(hybrid_tuner_instance_list); +static DEFINE_MUTEX(au8522_list_mutex); #define dprintk(arg...) do { \ if (debug) \ @@ -795,15 +796,23 @@ static struct dvb_frontend_ops au8522_ops; int au8522_get_state(struct au8522_state **state, struct i2c_adapter *i2c, u8 client_address) { - return hybrid_tuner_request_state(struct au8522_state, (*state), - hybrid_tuner_instance_list, - i2c, client_address, "au8522"); + int ret; + + mutex_lock(&au8522_list_mutex); + ret = hybrid_tuner_request_state(struct au8522_state, (*state), + hybrid_tuner_instance_list, + i2c, client_address, "au8522"); + mutex_unlock(&au8522_list_mutex); + + return ret; } void au8522_release_state(struct au8522_state *state) { + mutex_lock(&au8522_list_mutex); if (state != NULL) hybrid_tuner_release_state(state); + mutex_unlock(&au8522_list_mutex); } |