On 11/26/20 10:06 PM, Mathieu Poirier wrote:
> This patch introduces the capability to detach a remote processor
> that has been attached to or booted by the remoteproc core. For
> that to happen a rproc::ops::detach() operation need to be
> available.
>
> Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
> Reviewed-by: Peng Fan <peng.fan@xxxxxxx>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>
Thanks,
Arnaud
> ---
> drivers/remoteproc/remoteproc_cdev.c | 6 ++++++
> drivers/remoteproc/remoteproc_sysfs.c | 6 ++++++
> 2 files changed, 12 insertions(+)
>
> diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c
> index 61541bc7d26c..f7645f289563 100644
> --- a/drivers/remoteproc/remoteproc_cdev.c
> +++ b/drivers/remoteproc/remoteproc_cdev.c
> @@ -43,6 +43,12 @@ static ssize_t rproc_cdev_write(struct file *filp, const char __user *buf, size_
> return -EINVAL;
>
> ret = rproc_shutdown(rproc);
> + } else if (!strncmp(cmd, "detach", len)) {
> + if (rproc->state != RPROC_RUNNING &&
> + rproc->state != RPROC_ATTACHED)
> + return -EINVAL;
> +
> + ret = rproc_detach(rproc);
> } else {
> dev_err(&rproc->dev, "Unrecognized option\n");
> ret = -EINVAL;
> diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
> index 7d281cfe3e03..5a239df5877e 100644
> --- a/drivers/remoteproc/remoteproc_sysfs.c
> +++ b/drivers/remoteproc/remoteproc_sysfs.c
> @@ -207,6 +207,12 @@ static ssize_t state_store(struct device *dev,
> return -EINVAL;
>
> ret = rproc_shutdown(rproc);
> + } else if (sysfs_streq(buf, "detach")) {
> + if (rproc->state != RPROC_RUNNING &&
> + rproc->state != RPROC_ATTACHED)
> + return -EINVAL;
> +
> + ret = rproc_detach(rproc);
> } else {
> dev_err(&rproc->dev, "Unrecognised option: %s\n", buf);
> ret = -EINVAL;
>
