staging: comedi: introduce comedi_buf_n_bytes_ready()

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Introduce an inline helper to return the number of bytes that are
ready to read from the comedi_async buffer. Use the helper in the
comedi drivers that currently do the calculation as part of the
(*poll) operation.

Also, use the helper in comedi_fops where the calculation is used as
part of the subdevice going nonbusy.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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H Hartley Sweeten 2014-06-20 10:58:28 -07:00 • committed by Greg Kroah-Hartman

parent 5fc391853e

commit f4f3f7cf27

8 changed files with 13 additions and 9 deletions

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5

drivers/staging/comedi/comedi_fops.c

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5

drivers/staging/comedi/comedidev.h

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2

drivers/staging/comedi/drivers/das16m1.c

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drivers/staging/comedi/drivers/das1800.c

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drivers/staging/comedi/drivers/ni_mio_common.c

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2

drivers/staging/comedi/drivers/ni_pcidio.c

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drivers/staging/comedi/drivers/pcl812.c

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2

drivers/staging/comedi/drivers/pcl816.c

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