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dsp: add blocking call support in event notifier

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Add support for blocking call events in event notifier
to support functions which require waiting for events.

Change-Id: I255c19bc956506ea5076bb5fb1f09327141611a6
Signed-off-by: Ramprasad Katkam <katkam@codeaurora.org>
This commit is contained in:
Ramprasad Katkam
2018-08-31 03:29:24 +05:30
committed by Gerrit - the friendly Code Review server
parent 37e3245375
commit b5528d39f2
2 changed files with 60 additions and 0 deletions
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36
dsp/msm-audio-event-notify.c
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@@ -13,6 +13,7 @@
#include <linux/export.h>
static ATOMIC_NOTIFIER_HEAD(msm_aud_evt_notifier_list);
static BLOCKING_NOTIFIER_HEAD(msm_aud_evt_blocking_notifier_list);
/**
* msm_aud_evt_register_client - register a client notifier
@@ -43,3 +44,38 @@ int msm_aud_evt_notifier_call_chain(unsigned long val, void *v)
return atomic_notifier_call_chain(&msm_aud_evt_notifier_list, val, v);
}
EXPORT_SYMBOL_GPL(msm_aud_evt_notifier_call_chain);
/**
* msm_aud_evt_blocking_register_client - register a client notifier
* @nb: notifier block to callback on events
*/
int msm_aud_evt_blocking_register_client(struct notifier_block *nb)
{
return blocking_notifier_chain_register(
&msm_aud_evt_blocking_notifier_list, nb);
}
EXPORT_SYMBOL(msm_aud_evt_blocking_register_client);
/**
* msm_aud_evt_unregister_client - unregister a client notifier
* @nb: notifier block to callback on events
*/
int msm_aud_evt_blocking_unregister_client(struct notifier_block *nb)
{
return blocking_notifier_chain_unregister(
&msm_aud_evt_blocking_notifier_list, nb);
}
EXPORT_SYMBOL(msm_aud_evt_blocking_unregister_client);
/**
* msm_aud_evt_notifier_call_chain - notify clients of fb_events
* @val: event or enum maintained by caller
* @v: private data pointer
*
*/
int msm_aud_evt_blocking_notifier_call_chain(unsigned long val, void *v)
{
return blocking_notifier_call_chain(
&msm_aud_evt_blocking_notifier_list, val, v);
}
EXPORT_SYMBOL_GPL(msm_aud_evt_blocking_notifier_call_chain);