2020-11-27 08:44:38

by Mathieu Poirier

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

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 <[email protected]>
---
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);
--
2.25.1

2020-12-02 18:17:37

by Arnaud POULIQUEN

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

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 <[email protected]>


Reviewed-by: Arnaud Pouliquen <[email protected]>

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);
>