s390/qdio: simplify math in get_*_buffer_frontier()

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When determining the buffer count that get_buf_states() should
be queried for, 'count' is capped at 127 buffers.
So the check
	q->first_to_check == (q->first_to_check + count) % 128
can be reduced to
	count == 0

This helps to emphasize that get_buf_states() is really only
called with count > 0.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Julian Wiedmann 2017-12-06 08:53:33 +01:00 • committed by Martin Schwidefsky

parent bcbd41da3b

commit 152485bf76

1 changed files with 4 additions and 7 deletions

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11

drivers/s390/cio/qdio_main.c

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