Re: [PATCH v3 13/15] remoteproc: Properly deal with a start request when attached

[Arnaud POULIQUEN]

On 11/26/20 10:06 PM, Mathieu Poirier wrote:
> This patch takes into account scenarios where a remote processor
> has been attached to when receiving a "start" command from sysfs.
> 
> As with the "running" case, the command can't be carried out if the
> remote processor is already in operation.
> 
> Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>


Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>

Thanks,
Arnaud

> ---
>  drivers/remoteproc/remoteproc_cdev.c  | 3 ++-
>  drivers/remoteproc/remoteproc_sysfs.c | 3 ++-
>  2 files changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c
> index d06f8d4919c7..61541bc7d26c 100644
> --- a/drivers/remoteproc/remoteproc_cdev.c
> +++ b/drivers/remoteproc/remoteproc_cdev.c
> @@ -32,7 +32,8 @@ static ssize_t rproc_cdev_write(struct file *filp, const char __user *buf, size_
>  		return -EFAULT;
>  
>  	if (!strncmp(cmd, "start", len)) {
> -		if (rproc->state == RPROC_RUNNING)
> +		if (rproc->state == RPROC_RUNNING ||
> +		    rproc->state == RPROC_ATTACHED)
>  			return -EBUSY;
>  
>  		ret = rproc_boot(rproc);
> diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
> index 3696f2ccc785..7d281cfe3e03 100644
> --- a/drivers/remoteproc/remoteproc_sysfs.c
> +++ b/drivers/remoteproc/remoteproc_sysfs.c
> @@ -194,7 +194,8 @@ static ssize_t state_store(struct device *dev,
>  	int ret = 0;
>  
>  	if (sysfs_streq(buf, "start")) {
> -		if (rproc->state == RPROC_RUNNING)
> +		if (rproc->state == RPROC_RUNNING ||
> +		    rproc->state == RPROC_ATTACHED)
>  			return -EBUSY;
>  
>  		ret = rproc_boot(rproc);
>