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authorCornelia Huck <cornelia.huck@de.ibm.com>2006-12-04 15:40:54 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-12-04 15:40:54 +0100
commitce26a8532fd062ccd3f3c589a4be269a2dc20f00 (patch)
treedba7b023453f6077bafb750cf7fd55c040723907 /include/asm-s390/cio.h
parent09252e77ed13b1b412329825bad5797fbdd5a5c8 (diff)
downloadop-kernel-dev-ce26a8532fd062ccd3f3c589a4be269a2dc20f00.zip
op-kernel-dev-ce26a8532fd062ccd3f3c589a4be269a2dc20f00.tar.gz
[S390] cio: Make ccw_dev_id_is_equal() more robust.
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>
Diffstat (limited to 'include/asm-s390/cio.h')
-rw-r--r--include/asm-s390/cio.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/asm-s390/cio.h b/include/asm-s390/cio.h
index cabd5bb..d927850 100644
--- a/include/asm-s390/cio.h
+++ b/include/asm-s390/cio.h
@@ -278,7 +278,10 @@ struct ccw_dev_id {
static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
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);
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