staging: comedi: use DIV_ROUND_UP
The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) / (d)) but is perhaps more readable. Coccinelle script used : // <smpl> @haskernel@ @@ @depends on haskernel@ expression n,d; @@ ( - (n + d - 1) / d + DIV_ROUND_UP(n,d) | - (n + (d - 1)) / d + DIV_ROUND_UP(n,d) ) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP((n),d) + DIV_ROUND_UP(n,d) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP(n,(d)) + DIV_ROUND_UP(n,d) // </smpl> Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -317,8 +317,7 @@ unsigned int comedi_bytes_per_scan(struct comedi_subdevice *s)
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case COMEDI_SUBD_DO:
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case COMEDI_SUBD_DIO:
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bits_per_sample = 8 * bytes_per_sample(s);
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num_samples = (cmd->chanlist_len + bits_per_sample - 1) /
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bits_per_sample;
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num_samples = DIV_ROUND_UP(cmd->chanlist_len, bits_per_sample);
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break;
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default:
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num_samples = cmd->chanlist_len;
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