The common I/O layer may pass an error value as the irb in the device's
interrupt handler (for classic channel I/O). This won't happen in
current virtio-ccw implementations, but it's better to be safe than
sorry.
Let's just return the error conveyed by the irb and clear any possible
pending I/O indications.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Guenther Hutzl <hutzl@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Introduce /sys/debug/kernel/diag_stat with a statistic how many diagnose
calls have been done by each CPU in the system.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
In virtio_ccw_read_vq_conf() the return value of ccw_io_helper()
was not checked.
If the configuration could not be read properly, we'd wrongly assume a
queue size of 0.
Let's propagate any I/O error to virtio_ccw_setup_vq() so it may
properly fail.
Signed-off-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Bugfixes and documentation fixes. Igor's patch that allows
users to tweak memory table size is borderline,
but it does fix known crashes, so I merged it.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJVpBzpAAoJECgfDbjSjVRpQXEIAMEqetqPuRduynjIw2HNktle
fe/UUhvipwTsAM4R2pmcEl5tW04A/M54RkXN4iVy0rPshAfG3Fh4XTjLmzSGU0fI
KD6qX8/Zc/+DUWnfe3aUC6jOOrjb7c4xRKOlQ9X8lZgi2M6AzrPeoZHFTtbX34CU
2kcnv5Sb1SaI/t2SaCc2CaKilQalEOcd59gGjje2QXjidZnIVHwONrOyjBiINUy6
GzfTgvAje8ZiG6951W3HDwwSfcqXezin27LJqnZgaLCwTCKt2gdQ2MAKjrfP2aVF
+gX2B4XxcFLutMVx/obsjvA1ceipubyUauRLB3mnO3P5VOj1qbofa2lj4pzQ80k=
=EKPr
-----END PGP SIGNATURE-----
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio/vhost fixes from Michael Tsirkin:
"Bugfixes and documentation fixes.
Igor's patch that allows users to tweak memory table size is
borderline, but it does fix known crashes, so I merged it"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vhost: add max_mem_regions module parameter
vhost: extend memory regions allocation to vmalloc
9p/trans_virtio: reset virtio device on remove
virtio/s390: rename drivers/s390/kvm -> drivers/s390/virtio
MAINTAINERS: separate section for s390 virtio drivers
virtio: define virtio_pci_cfg_cap in header.
virtio: Fix typecast of pointer in vring_init()
virtio scsi: fix unused variable warning
vhost: use binary search instead of linear in find_region()
virtio_net: document VIRTIO_NET_CTRL_GUEST_OFFLOADS
This more accurately reflects what these drivers actually do.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Cornelia Huck