diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/cec/core/cec-adap.c | 38 | ||||
| -rw-r--r-- | drivers/media/cec/core/cec-api.c | 6 | ||||
| -rw-r--r-- | drivers/media/cec/core/cec-core.c | 3 |
3 files changed, 30 insertions, 17 deletions
diff --git a/drivers/media/cec/core/cec-adap.c b/drivers/media/cec/core/cec-adap.c index 0546650b3853..2e12331c12a9 100644 --- a/drivers/media/cec/core/cec-adap.c +++ b/drivers/media/cec/core/cec-adap.c @@ -161,10 +161,10 @@ static void cec_queue_event(struct cec_adapter *adap, u64 ts = ktime_get_ns(); struct cec_fh *fh; - mutex_lock(&adap->devnode.lock); + mutex_lock(&adap->devnode.lock_fhs); list_for_each_entry(fh, &adap->devnode.fhs, list) cec_queue_event_fh(fh, ev, ts); - mutex_unlock(&adap->devnode.lock); + mutex_unlock(&adap->devnode.lock_fhs); } /* Notify userspace that the CEC pin changed state at the given time. */ @@ -178,11 +178,12 @@ void cec_queue_pin_cec_event(struct cec_adapter *adap, bool is_high, }; struct cec_fh *fh; - mutex_lock(&adap->devnode.lock); - list_for_each_entry(fh, &adap->devnode.fhs, list) + mutex_lock(&adap->devnode.lock_fhs); + list_for_each_entry(fh, &adap->devnode.fhs, list) { if (fh->mode_follower == CEC_MODE_MONITOR_PIN) cec_queue_event_fh(fh, &ev, ktime_to_ns(ts)); - mutex_unlock(&adap->devnode.lock); + } + mutex_unlock(&adap->devnode.lock_fhs); } EXPORT_SYMBOL_GPL(cec_queue_pin_cec_event); @@ -195,10 +196,10 @@ void cec_queue_pin_hpd_event(struct cec_adapter *adap, bool is_high, ktime_t ts) }; struct cec_fh *fh; - mutex_lock(&adap->devnode.lock); + mutex_lock(&adap->devnode.lock_fhs); list_for_each_entry(fh, &adap->devnode.fhs, list) cec_queue_event_fh(fh, &ev, ktime_to_ns(ts)); - mutex_unlock(&adap->devnode.lock); + mutex_unlock(&adap->devnode.lock_fhs); } EXPORT_SYMBOL_GPL(cec_queue_pin_hpd_event); @@ -211,10 +212,10 @@ void cec_queue_pin_5v_event(struct cec_adapter *adap, bool is_high, ktime_t ts) }; struct cec_fh *fh; - mutex_lock(&adap->devnode.lock); + mutex_lock(&adap->devnode.lock_fhs); list_for_each_entry(fh, &adap->devnode.fhs, list) cec_queue_event_fh(fh, &ev, ktime_to_ns(ts)); - mutex_unlock(&adap->devnode.lock); + mutex_unlock(&adap->devnode.lock_fhs); } EXPORT_SYMBOL_GPL(cec_queue_pin_5v_event); @@ -286,12 +287,12 @@ static void cec_queue_msg_monitor(struct cec_adapter *adap, u32 monitor_mode = valid_la ? CEC_MODE_MONITOR : CEC_MODE_MONITOR_ALL; - mutex_lock(&adap->devnode.lock); + mutex_lock(&adap->devnode.lock_fhs); list_for_each_entry(fh, &adap->devnode.fhs, list) { if (fh->mode_follower >= monitor_mode) cec_queue_msg_fh(fh, msg); } - mutex_unlock(&adap->devnode.lock); + mutex_unlock(&adap->devnode.lock_fhs); } /* @@ -302,12 +303,12 @@ static void cec_queue_msg_followers(struct cec_adapter *adap, { struct cec_fh *fh; - mutex_lock(&adap->devnode.lock); + mutex_lock(&adap->devnode.lock_fhs); list_for_each_entry(fh, &adap->devnode.fhs, list) { if (fh->mode_follower == CEC_MODE_FOLLOWER) cec_queue_msg_fh(fh, msg); } - mutex_unlock(&adap->devnode.lock); + mutex_unlock(&adap->devnode.lock_fhs); } /* Notify userspace of an adapter state change. */ @@ -1579,6 +1580,7 @@ void __cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block) /* Disabling monitor all mode should always succeed */ if (adap->monitor_all_cnt) WARN_ON(call_op(adap, adap_monitor_all_enable, false)); + /* serialize adap_enable */ mutex_lock(&adap->devnode.lock); if (adap->needs_hpd || list_empty(&adap->devnode.fhs)) { WARN_ON(adap->ops->adap_enable(adap, false)); @@ -1590,14 +1592,16 @@ void __cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block) return; } + /* serialize adap_enable */ mutex_lock(&adap->devnode.lock); adap->last_initiator = 0xff; adap->transmit_in_progress = false; - if ((adap->needs_hpd || list_empty(&adap->devnode.fhs)) && - adap->ops->adap_enable(adap, true)) { - mutex_unlock(&adap->devnode.lock); - return; + if (adap->needs_hpd || list_empty(&adap->devnode.fhs)) { + if (adap->ops->adap_enable(adap, true)) { + mutex_unlock(&adap->devnode.lock); + return; + } } if (adap->monitor_all_cnt && diff --git a/drivers/media/cec/core/cec-api.c b/drivers/media/cec/core/cec-api.c index 0edb7142afdb..d72ad48c9898 100644 --- a/drivers/media/cec/core/cec-api.c +++ b/drivers/media/cec/core/cec-api.c @@ -586,6 +586,7 @@ static int cec_open(struct inode *inode, struct file *filp) return err; } + /* serialize adap_enable */ mutex_lock(&devnode->lock); if (list_empty(&devnode->fhs) && !adap->needs_hpd && @@ -624,7 +625,9 @@ static int cec_open(struct inode *inode, struct file *filp) } #endif + mutex_lock(&devnode->lock_fhs); list_add(&fh->list, &devnode->fhs); + mutex_unlock(&devnode->lock_fhs); mutex_unlock(&devnode->lock); return 0; @@ -653,8 +656,11 @@ static int cec_release(struct inode *inode, struct file *filp) cec_monitor_all_cnt_dec(adap); mutex_unlock(&adap->lock); + /* serialize adap_enable */ mutex_lock(&devnode->lock); + mutex_lock(&devnode->lock_fhs); list_del(&fh->list); + mutex_unlock(&devnode->lock_fhs); if (cec_is_registered(adap) && list_empty(&devnode->fhs) && !adap->needs_hpd && adap->phys_addr == CEC_PHYS_ADDR_INVALID) { WARN_ON(adap->ops->adap_enable(adap, false)); diff --git a/drivers/media/cec/core/cec-core.c b/drivers/media/cec/core/cec-core.c index 551689d371a7..ec67065d5202 100644 --- a/drivers/media/cec/core/cec-core.c +++ b/drivers/media/cec/core/cec-core.c @@ -169,8 +169,10 @@ static void cec_devnode_unregister(struct cec_adapter *adap) devnode->registered = false; devnode->unregistered = true; + mutex_lock(&devnode->lock_fhs); list_for_each_entry(fh, &devnode->fhs, list) wake_up_interruptible(&fh->wait); + mutex_unlock(&devnode->lock_fhs); mutex_unlock(&devnode->lock); @@ -272,6 +274,7 @@ struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops, /* adap->devnode initialization */ INIT_LIST_HEAD(&adap->devnode.fhs); + mutex_init(&adap->devnode.lock_fhs); mutex_init(&adap->devnode.lock); adap->kthread = kthread_run(cec_thread_func, adap, "cec-%s", name); |