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V4L/DVB (9335): videobuf: split unregister bus creating self-contained frontend de-allocator 

This creates a self contained frontend de-allocator
for the instances where an adapter has not been
registered yet frontend de-allocation may
be required.

Signed-off-by: Darron Broad <darron@kewl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Darron Broad 2008-10-21 11:28:46 -03:00 committed by Mauro Carvalho Chehab
parent 0fcd488d8d
commit 878595f6e7
2 changed files with 30 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/media/video/videobuf-dvb.c
View File

@ -296,29 +296,7 @@ EXPORT_SYMBOL(videobuf_dvb_register_bus);
void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f)
{
struct list_head *list, *q;
struct videobuf_dvb_frontend *fe;
mutex_lock(&f->lock);
list_for_each_safe(list, q, &f->felist) {
fe = list_entry(list, struct videobuf_dvb_frontend, felist);
if (fe->dvb.net.dvbdev) {
dvb_net_release(&fe->dvb.net);
fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
&fe->dvb.fe_mem);
fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
&fe->dvb.fe_hw);
dvb_dmxdev_release(&fe->dvb.dmxdev);
dvb_dmx_release(&fe->dvb.demux);
dvb_unregister_frontend(fe->dvb.frontend);
}
if (fe->dvb.frontend)
/* always allocated, may have been reset */
dvb_frontend_detach(fe->dvb.frontend);
list_del(list);
kfree(fe);
}
mutex_unlock(&f->lock);
videobuf_dvb_dealloc_frontends(f);
dvb_unregister_adapter(&f->adapter);
}
@ -389,3 +367,31 @@ fail_alloc:
return fe;
}
EXPORT_SYMBOL(videobuf_dvb_alloc_frontend);
void videobuf_dvb_dealloc_frontends(struct videobuf_dvb_frontends *f)
{
struct list_head *list, *q;
struct videobuf_dvb_frontend *fe;
mutex_lock(&f->lock);
list_for_each_safe(list, q, &f->felist) {
fe = list_entry(list, struct videobuf_dvb_frontend, felist);
if (fe->dvb.net.dvbdev) {
dvb_net_release(&fe->dvb.net);
fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
&fe->dvb.fe_mem);
fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
&fe->dvb.fe_hw);
dvb_dmxdev_release(&fe->dvb.dmxdev);
dvb_dmx_release(&fe->dvb.demux);
dvb_unregister_frontend(fe->dvb.frontend);
}
if (fe->dvb.frontend)
/* always allocated, may have been reset */
dvb_frontend_detach(fe->dvb.frontend);
list_del(list); /* remove list entry */
kfree(fe); /* free frontend allocation */
}
mutex_unlock(&f->lock);
}
EXPORT_SYMBOL(videobuf_dvb_dealloc_frontends);

1
include/media/videobuf-dvb.h
View File

@ -47,6 +47,7 @@ int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f,
void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f);
struct videobuf_dvb_frontend * videobuf_dvb_alloc_frontend(struct videobuf_dvb_frontends *f, int id);
void videobuf_dvb_dealloc_frontends(struct videobuf_dvb_frontends *f);
struct videobuf_dvb_frontend * videobuf_dvb_get_frontend(struct videobuf_dvb_frontends *f, int id);
int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends *f, struct dvb_frontend *p);