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 <[email protected]> Reviewed-by: Arnaud Pouliquen <[email protected]> Tested-by: Arnaud Pouliquen <[email protected]> --- 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 */ -- 2.25.1
