[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>
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 @@
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);