Cornelia Huck cf94db2190 virtio: Honour 'may_reduce_num' in vring_create_virtqueue ... vring_create_virtqueue() allows the caller to specify via the may_reduce_num parameter whether the vring code is allowed to allocate a smaller ring than specified. However, the split ring allocation code tries to allocate a smaller ring on allocation failure regardless of what the caller specified. This may cause trouble for e.g. virtio-pci in legacy mode, which does not support ring resizing. (The packed ring code does not resize in any case.) Let's fix this by bailing out immediately in the split ring code if the requested size cannot be allocated and may_reduce_num has not been specified. While at it, fix a typo in the usage instructions. Fixes: 2a2d1382fe ("virtio: Add improved queue allocation API") Cc: stable@vger.kernel.org # v4.6+ Signed-off-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Halil Pasic <pasic@linux.ibm.com> Reviewed-by: Jens Freimann <jfreimann@redhat.com>		2019-04-08 17:05:52 -04:00
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Kconfig
Makefile
virtio_balloon.c	virtio_balloon: remove the unnecessary 0-initialization	2019-03-06 11:19:33 -05:00
virtio_input.c
virtio_mmio.c	virtio: don't allocate vqs when names[i] = NULL	2019-01-14 20:15:19 -05:00
virtio_pci_common.c	virtio_pci: fix a NULL pointer reference in vp_del_vqs	2019-04-08 08:40:58 -04:00
virtio_pci_common.h	virtio: Make vp_set_vq_affinity() take a mask.	2018-08-11 12:02:18 -07:00
virtio_pci_legacy.c	virtio: remove deprecated VIRTIO_PCI_CONFIG()	2018-12-19 18:23:49 -05:00
virtio_pci_modern.c	virtio_pci: support enabling VFs	2018-06-12 04:59:29 +03:00
virtio_ring.c	virtio: Honour 'may_reduce_num' in vring_create_virtqueue	2019-04-08 17:05:52 -04:00
virtio.c	virtio: hint if callbacks surprisingly might sleep	2019-03-06 11:19:57 -05:00