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staging: comedi: comedi_fops: introduce comedi_is_subdevice_running()

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Introduce a helper function that checks the subdevice runflags to
see if the subdevice is running a command.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2012-12-19 15:42:47 -07:00 committed by Greg Kroah-Hartman
parent 74120719a7
commit e0dac318ee
2 changed files with 10 additions and 0 deletions
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8
drivers/staging/comedi/comedi_fops.c
View File

@ -375,6 +375,14 @@ unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s)
}
EXPORT_SYMBOL(comedi_get_subdevice_runflags);
bool comedi_is_subdevice_running(struct comedi_subdevice *s)
{
unsigned runflags = comedi_get_subdevice_runflags(s);
return (runflags & SRF_RUNNING) ? true : false;
}
EXPORT_SYMBOL_GPL(comedi_is_subdevice_running);
/*
This function restores a subdevice to an idle state.
*/

2
drivers/staging/comedi/comedidev.h
View File

@ -362,6 +362,8 @@ enum subdevice_runflags {
SRF_RUNNING = 0x08000000
};
bool comedi_is_subdevice_running(struct comedi_subdevice *s);
int comedi_check_chanlist(struct comedi_subdevice *s,
int n,
unsigned int *chanlist);