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[media] dvb_frontend: add "detach" callback

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Prepare for making "release" asynchronous (via kref).  Some operations
may need to be run synchronously in dvb_frontend_detach(), and that's
why we need a "detach" callback.

Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Max Kellermann 2016-08-09 18:32:41 -03:00 committed by Mauro Carvalho Chehab
parent 967d8e8f4c
commit d812b3caea
2 changed files with 7 additions and 1 deletions
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1
drivers/media/dvb-core/dvb_frontend.c
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@ -2756,6 +2756,7 @@ void dvb_frontend_detach(struct dvb_frontend* fe)
dvb_frontend_invoke_release(fe, fe->ops.release_sec);
dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release);
dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release);
dvb_frontend_invoke_release(fe, fe->ops.detach);
dvb_frontend_invoke_release(fe, fe->ops.release);
}
EXPORT_SYMBOL(dvb_frontend_detach);

7
drivers/media/dvb-core/dvb_frontend.h
View File

@ -330,7 +330,11 @@ struct dtv_frontend_properties;
*
* @info: embedded struct dvb_tuner_info with tuner properties
* @delsys: Delivery systems supported by the frontend
* @release: callback function called when frontend is dettached.
* @detach: callback function called when frontend is detached.
* drivers should clean up, but not yet free the struct
* dvb_frontend allocation.
* @release: callback function called when frontend is ready to be
* freed.
* drivers should free any allocated memory.
* @release_sec: callback function requesting that the Satelite Equipment
* Control (SEC) driver to release and free any memory
@ -415,6 +419,7 @@ struct dvb_frontend_ops {
u8 delsys[MAX_DELSYS];
void (*detach)(struct dvb_frontend *fe);
void (*release)(struct dvb_frontend* fe);
void (*release_sec)(struct dvb_frontend* fe);