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[S390] cio: Make ccw_dev_id_is_equal() more robust.

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Using memcmp to compare ccw_dev_id implies that the whole structure (incl.
padding) has always been completely initialized to sane values. Comparing
the structures field by field doesn't make such assumptions.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Cornelia Huck 2006-12-04 15:40:54 +01:00 committed by Martin Schwidefsky
parent 09252e77ed
commit ce26a8532f
1 changed files with 4 additions and 1 deletions
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5
include/asm-s390/cio.h
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@ -278,7 +278,10 @@ struct ccw_dev_id {
static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1, static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
struct ccw_dev_id *dev_id2) struct ccw_dev_id *dev_id2)
{ {
return !memcmp(dev_id1, dev_id2, sizeof(struct ccw_dev_id)); if ((dev_id1->ssid == dev_id2->ssid) &&
(dev_id1->devno == dev_id2->devno))
return 1;
return 0;
} }
extern int diag210(struct diag210 *addr); extern int diag210(struct diag210 *addr);