| Message ID | 20210223233515.3468677-15-mathieu.poirier@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | remoteproc: Add support for detaching a remote processor | expand |
On 2/24/21 12:35 AM, Mathieu Poirier wrote: > Allow a remote processor that was started by another entity to be > switched off by the remoteproc core. For that to happen a > rproc::ops::stop() operation needs to be available. > > Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> Thanks, Arnaud > --- > New for V6: > - Removed state check in rproc_shutdown() as it is already done in > in calling functions. > - rproc_shutdown() doesn't return an error code to keep legacy behevior. > - Removed Peng and Arnaud's RB tags because of the above. > --- > > drivers/remoteproc/remoteproc_cdev.c | 3 ++- > drivers/remoteproc/remoteproc_core.c | 4 ++++ > drivers/remoteproc/remoteproc_sysfs.c | 3 ++- > 3 files changed, 8 insertions(+), 2 deletions(-) > > diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c > index b2cee9afb41b..0249d8f6c3f8 100644 > --- a/drivers/remoteproc/remoteproc_cdev.c > +++ b/drivers/remoteproc/remoteproc_cdev.c > @@ -38,7 +38,8 @@ static ssize_t rproc_cdev_write(struct file *filp, const char __user *buf, size_ > > ret = rproc_boot(rproc); > } else if (!strncmp(cmd, "stop", len)) { > - if (rproc->state != RPROC_RUNNING) > + if (rproc->state != RPROC_RUNNING && > + rproc->state != RPROC_ATTACHED) > return -EINVAL; > > rproc_shutdown(rproc); > diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c > index 0dc518a24104..00452da25fba 100644 > --- a/drivers/remoteproc/remoteproc_core.c > +++ b/drivers/remoteproc/remoteproc_core.c > @@ -1758,6 +1758,10 @@ static int rproc_stop(struct rproc *rproc, bool crashed) > struct device *dev = &rproc->dev; > int ret; > > + /* No need to continue if a stop() operation has not been provided */ > + if (!rproc->ops->stop) > + return -EINVAL; > + > /* Stop any subdevices for the remote processor */ > rproc_stop_subdevices(rproc, crashed); > > diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c > index 66801e6fe5cd..09eb700c5e7e 100644 > --- a/drivers/remoteproc/remoteproc_sysfs.c > +++ b/drivers/remoteproc/remoteproc_sysfs.c > @@ -202,7 +202,8 @@ static ssize_t state_store(struct device *dev, > if (ret) > dev_err(&rproc->dev, "Boot failed: %d\n", ret); > } else if (sysfs_streq(buf, "stop")) { > - if (rproc->state != RPROC_RUNNING) > + if (rproc->state != RPROC_RUNNING && > + rproc->state != RPROC_ATTACHED) > return -EINVAL; > > rproc_shutdown(rproc); >
diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c index b2cee9afb41b..0249d8f6c3f8 100644 --- a/drivers/remoteproc/remoteproc_cdev.c +++ b/drivers/remoteproc/remoteproc_cdev.c @@ -38,7 +38,8 @@ static ssize_t rproc_cdev_write(struct file *filp, const char __user *buf, size_ ret = rproc_boot(rproc); } else if (!strncmp(cmd, "stop", len)) { - if (rproc->state != RPROC_RUNNING) + if (rproc->state != RPROC_RUNNING && + rproc->state != RPROC_ATTACHED) return -EINVAL; rproc_shutdown(rproc); diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 0dc518a24104..00452da25fba 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -1758,6 +1758,10 @@ static int rproc_stop(struct rproc *rproc, bool crashed) struct device *dev = &rproc->dev; int ret; + /* No need to continue if a stop() operation has not been provided */ + if (!rproc->ops->stop) + return -EINVAL; + /* Stop any subdevices for the remote processor */ rproc_stop_subdevices(rproc, crashed); diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c index 66801e6fe5cd..09eb700c5e7e 100644 --- a/drivers/remoteproc/remoteproc_sysfs.c +++ b/drivers/remoteproc/remoteproc_sysfs.c @@ -202,7 +202,8 @@ static ssize_t state_store(struct device *dev, if (ret) dev_err(&rproc->dev, "Boot failed: %d\n", ret); } else if (sysfs_streq(buf, "stop")) { - if (rproc->state != RPROC_RUNNING) + if (rproc->state != RPROC_RUNNING && + rproc->state != RPROC_ATTACHED) return -EINVAL; rproc_shutdown(rproc);
Allow a remote processor that was started by another entity to be switched off by the remoteproc core. For that to happen a rproc::ops::stop() operation needs to be available. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> --- New for V6: - Removed state check in rproc_shutdown() as it is already done in in calling functions. - rproc_shutdown() doesn't return an error code to keep legacy behevior. - Removed Peng and Arnaud's RB tags because of the above. --- drivers/remoteproc/remoteproc_cdev.c | 3 ++- drivers/remoteproc/remoteproc_core.c | 4 ++++ drivers/remoteproc/remoteproc_sysfs.c | 3 ++- 3 files changed, 8 insertions(+), 2 deletions(-)