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| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2013-06-04 11:04:47 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-01-17 13:12:22 +0100 |
| commit | 19e4735bd7f02bd38db43a8521377b35f236b3b6 (patch) | |
| tree | 99c2faaeedd26bcc599f86f9e830a2160dfc3620 /drivers/s390/kvm | |
| parent | d208c79d63e06457eef077af770d23dc4cde4d43 (diff) | |
| download | linux-19e4735bd7f02bd38db43a8521377b35f236b3b6.tar.gz linux-19e4735bd7f02bd38db43a8521377b35f236b3b6.tar.bz2 linux-19e4735bd7f02bd38db43a8521377b35f236b3b6.zip | |
KVM: s390: virtio-ccw: Handle command rejects.
A command reject for a ccw may happen if we run on a host not supporting
a certain feature. We want to be able to handle this as special case of
command failure, so let's split this off from the generic -EIO error code.
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'drivers/s390/kvm')
| -rw-r--r-- | drivers/s390/kvm/virtio_ccw.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/s390/kvm/virtio_ccw.c b/drivers/s390/kvm/virtio_ccw.c index d6297176ab85..0fc584832001 100644 --- a/drivers/s390/kvm/virtio_ccw.c +++ b/drivers/s390/kvm/virtio_ccw.c @@ -642,8 +642,15 @@ static void virtio_ccw_int_handler(struct ccw_device *cdev, (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))) { /* OK */ } - if (irb_is_error(irb)) - vcdev->err = -EIO; /* XXX - use real error */ + if (irb_is_error(irb)) { + /* Command reject? */ + if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && + (irb->ecw[0] & SNS0_CMD_REJECT)) + vcdev->err = -EOPNOTSUPP; + else + /* Map everything else to -EIO. */ + vcdev->err = -EIO; + } if (vcdev->curr_io & activity) { switch (activity) { case VIRTIO_CCW_DOING_READ_FEAT: |