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Commit 68ef50f6 authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
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staging: comedi: comedi_fc: tidy up cfc_bytes_per_scan() 



This function returns the total number of bytes for a full scan of
an async command chanlist. The returned value is an unsigned int.

Change all the local variables to unsigned int and use a local
variable for the s->async->cmd.chanlist_len.

Signed-off-by: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: default avatarIan Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a3065bc9

drivers/staging/comedi/drivers/comedi_fc.h

+6 −5
Original line number Diff line number Diff line
@@ -47,19 +47,20 @@ unsigned int cfc_handle_events(struct comedi_device *, 


static inline unsigned int cfc_bytes_per_scan(struct comedi_subdevice *s)

{

	int num_samples;

	int bits_per_sample;

	unsigned int chanlist_len = s->async->cmd.chanlist_len;

	unsigned int num_samples;

	unsigned int bits_per_sample;



	switch (s->type) {

	case COMEDI_SUBD_DI:

	case COMEDI_SUBD_DO:

	case COMEDI_SUBD_DIO:

		bits_per_sample = 8 * bytes_per_sample(s);

		num_samples = (s->async->cmd.chanlist_len +

			       bits_per_sample - 1) / bits_per_sample;

		num_samples = (chanlist_len + bits_per_sample - 1) /

				bits_per_sample;

		break;

	default:

		num_samples = s->async->cmd.chanlist_len;

		num_samples = chanlist_len;

		break;

	}

	return num_samples * bytes_per_sample(s);