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hw/s390x/3270-ccw: avoid taking address of fields in packed struct

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Compiling with GCC 9 complains

hw/s390x/3270-ccw.c: In function ‘emulated_ccw_3270_cb’:
hw/s390x/3270-ccw.c:81:19: error: taking address of packed member of ‘struct SCHIB’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
   81 |         SCSW *s = &sch->curr_status.scsw;
      |                   ^~~~~~~~~~~~~~~~~~~~~~

This local variable is only present to save a little bit of
typing when setting the field later. Get rid of this to avoid
the warning about unaligned accesses.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20190329111104.17223-15-berrange@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2019-03-29 11:11:04 +00:00 committed by Cornelia Huck
parent 5d45a33292
commit 7357b22159
1 changed files with 4 additions and 4 deletions
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8
hw/s390x/3270-ccw.c
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@ -78,13 +78,13 @@ static int emulated_ccw_3270_cb(SubchDev *sch, CCW1 ccw)
if (rc == -EIO) {
/* I/O error, specific devices generate specific conditions */
SCSW *s = &sch->curr_status.scsw;
SCHIB *schib = &sch->curr_status;
sch->curr_status.scsw.dstat = SCSW_DSTAT_UNIT_CHECK;
sch->sense_data[0] = 0x40; /* intervention-req */
s->ctrl &= ~SCSW_ACTL_START_PEND;
s->ctrl &= ~SCSW_CTRL_MASK_STCTL;
s->ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
schib->scsw.ctrl &= ~SCSW_ACTL_START_PEND;
schib->scsw.ctrl &= ~SCSW_CTRL_MASK_STCTL;
schib->scsw.ctrl |= SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY |
SCSW_STCTL_ALERT | SCSW_STCTL_STATUS_PEND;
}