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s390/cio: fix length calculation in idset.c

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bitmap_or uses the number of bits as its length parameter and
not the number of words necessary to store those bits.

This fixes a regression introduced by:
	aa92b33 s390/cio: use generic bitmap functions

Reported-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2012-11-06 15:10:05 +01:00 committed by Martin Schwidefsky
parent 99e639b791
commit 7f0bc6c0d4
1 changed files with 1 additions and 2 deletions
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3
drivers/s390/cio/idset.c
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@ -125,8 +125,7 @@ int idset_is_empty(struct idset *set)
void idset_add_set(struct idset *to, struct idset *from)
{
int len = min(__BITOPS_WORDS(to->num_ssid * to->num_id),
__BITOPS_WORDS(from->num_ssid * from->num_id));
int len = min(to->num_ssid * to->num_id, from->num_ssid * from->num_id);
bitmap_or(to->bitmap, to->bitmap, from->bitmap, len);
}