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Commit bd86055f authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

s390/scm_blk: allow more cluster size values 



Allow 0 and powers of 2 between 2 and 128 for write_cluster_size.

Reviewed-by: default avatarPeter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 3ad19b8f

drivers/s390/block/scm_blk_cluster.c

+4 −2
Original line number Diff line number Diff line
@@ -223,6 +223,8 @@ void scm_cluster_request_irq(struct scm_request *scmrq) 


bool scm_cluster_size_valid(void)

{

	return write_cluster_size == 0 || write_cluster_size == 32 ||

		write_cluster_size == 64 || write_cluster_size == 128;

	if (write_cluster_size == 1 || write_cluster_size > 128)

		return false;



	return !(write_cluster_size & (write_cluster_size - 1));

}