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authorMathieu Poirier <mathieu.poirier@linaro.org>2021-03-12 17:24:52 +0100
committerBjorn Andersson <bjorn.andersson@linaro.org>2021-03-18 14:02:10 +0100
commit5daaeb5f07ed0681b734864dde58dcadab115963 (patch)
tree9e35bf520f71d93a47ec6cb0b356341327a4e3e0 /drivers/remoteproc/remoteproc_sysfs.c
parentremoteproc: Properly deal with a stop request when attached (diff)
downloadlinux-5daaeb5f07ed0681b734864dde58dcadab115963.tar.xz
linux-5daaeb5f07ed0681b734864dde58dcadab115963.zip
remoteproc: Properly deal with a detach request when attached
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>
Diffstat (limited to 'drivers/remoteproc/remoteproc_sysfs.c')
-rw-r--r--drivers/remoteproc/remoteproc_sysfs.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
index 23c0dc1ddc34..ea8b89f97d7b 100644
--- a/drivers/remoteproc/remoteproc_sysfs.c
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -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;