On 7/7/20 11:00 PM, Mathieu Poirier wrote:
> Add a new function to assert the general health of the remote
> processor before handing it to the remoteproc core.
>
> Signed-off-by: Mathieu Poirier <mathieu.poir...@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliq...@st.com>
Thanks,
Arnaud
> ---
> drivers/remoteproc/remoteproc_core.c | 41 ++++++++++++++++++++++++++++
> 1 file changed, 41 insertions(+)
>
> diff --git a/drivers/remoteproc/remoteproc_core.c
> b/drivers/remoteproc/remoteproc_core.c
> index fd424662801f..ad500c291d5f 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -2040,6 +2040,43 @@ struct rproc *rproc_get_by_phandle(phandle phandle)
> #endif
> EXPORT_SYMBOL(rproc_get_by_phandle);
>
> +static int rproc_validate(struct rproc *rproc)
> +{
> + switch (rproc->state) {
> + case RPROC_OFFLINE:
> + /*
> + * An offline processor without a start()
> + * function makes no sense.
> + */
> + if (!rproc->ops->start)
> + return -EINVAL;
> + break;
> + case RPROC_DETACHED:
> + /*
> + * A remote processor in a detached state without an
> + * attach() function makes not sense.
> + */
> + if (!rproc->ops->attach)
> + return -EINVAL;
> + /*
> + * When attaching to a remote processor the device memory
> + * is already available and as such there is no need to have a
> + * cached table.
> + */
> + if (rproc->cached_table)
> + return -EINVAL;
> + break;
> + default:
> + /*
> + * When adding a remote processor, the state of the device
> + * can be offline or detached, nothing else.
> + */
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> /**
> * rproc_add() - register a remote processor
> * @rproc: the remote processor handle to register
> @@ -2069,6 +2106,10 @@ int rproc_add(struct rproc *rproc)
> if (ret < 0)
> return ret;
>
> + ret = rproc_validate(rproc);
> + if (ret < 0)
> + return ret;
> +
> dev_info(dev, "%s is available\n", rproc->name);
>
> /* create debugfs entries */
>
