Re: [RFC 1/2] virtio_console: Add support for DMA memory allocation

"Michael S. Tsirkin" [off-list ref] writes:

quoted

virtio: don't crash when device is buggy

Because of a sanity check in virtio_dev_remove, a buggy device can crash
kernel.  And in case of rproc it's userspace so it's not a good idea.
We are unloading a driver so how bad can it be?
Be less aggressive in handling this error: if it's a driver bug,
warning once should be enough.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Rusty?

Thanks, applied.

I really want to implement CONFIG_VIRTIO_DEVEL_DEBUG which would
incorporate the checks in virtio_ring.c as well as this.  Then I could
also reshuffle descriptors (eg. split them) to find buggy devices like
qemu which assume the first descriptor is the struct virtio_net_hdr...

Cheers,
Rusty,