sjur.brandel...@stericsson.com writes:
> From: Sjur Brændeland <sjur.brandel...@stericsson.com>
>
> Add a simple serial connection driver called
> VIRTIO_ID_RPROC_SERIAL (11) for communicating with a
> remote processor in an asymmetric multi-processing
> configuration.
>
...
> static struct port_buffer *alloc_buf(struct virtqueue *vq, size_t buf_size,
> int nrbufs)
> {
> struct port_buffer *buf;
> size_t alloc_size;
>
> + if (is_rproc_serial(vq->vdev) && !irqs_disabled())
> + reclaim_dma_bufs();
Hmm, you need a gfp_t arg into alloc_buf; your last patch simply changed
them all to GFP_ATOMIC, which makes the console far less memory
friendly.
You check !irqs_disabled() in a couple of places; I think the caller
needs to indicate (possibly by checking for gfp == GFP_KERNEL) whether
it's safe to call reclaim_dma_bufs().
> @@ -838,6 +927,10 @@ static ssize_t port_fops_splice_write(struct
> pipe_inode_info *pipe,
> .u.data = &sgl,
> };
>
> + /* rproc_serial does not support splice */
> + if (is_rproc_serial(port->out_vq->vdev))
> + return -EINVAL;
Why not? ;)
Thanks,
Rusty.
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