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remoteproc: Properly deal with a detach request when attached

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This patch introduces the capability to detach a remote processor
that has been attached to by the remoteproc core.  For that to happen
a rproc::ops::detach() operation needs to be available.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-17-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Mathieu Poirier 2021-03-12 09:24:52 -07:00 committed by Bjorn Andersson
parent d2008a9683
commit 5daaeb5f07
2 changed files with 10 additions and 0 deletions
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5
drivers/remoteproc/remoteproc_cdev.c
View File

@ -43,6 +43,11 @@ static ssize_t rproc_cdev_write(struct file *filp, const char __user *buf, size_
return -EINVAL;
rproc_shutdown(rproc);
} else if (!strncmp(cmd, "detach", len)) {
if (rproc->state != RPROC_ATTACHED)
return -EINVAL;
ret = rproc_detach(rproc);
} else {
dev_err(&rproc->dev, "Unrecognized option\n");
ret = -EINVAL;

5
drivers/remoteproc/remoteproc_sysfs.c
View File

@ -207,6 +207,11 @@ static ssize_t state_store(struct device *dev,
return -EINVAL;
rproc_shutdown(rproc);
} else if (sysfs_streq(buf, "detach")) {
if (rproc->state != RPROC_ATTACHED)
return -EINVAL;
ret = rproc_detach(rproc);
} else {
dev_err(&rproc->dev, "Unrecognised option: %s\n", buf);
ret = -EINVAL;