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Subject[PATCH v2 1/2] remoteproc: Add RPROC_DELETED state
Date
Add new state RPROC_DELETED to handle synchronization
between rproc_del() and other operations on rproc. This
state represents the rproc device that has been "deleted".

CC: Loic Pallardy <loic.pallardy@st.com>
CC: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
---

The current patch series is a v2 version of original patch listed at
https://lkml.org/lkml/2016/12/16/534

Changes from v1:

* Add new RPROC_DELETED state
* Use the new state RPROC_DELETED to handle race between rproc_del()
and rproc_boot()

drivers/remoteproc/remoteproc_sysfs.c | 1 +
include/linux/remoteproc.h | 4 +++-
2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
index bc5b0e0..47be411 100644
--- a/drivers/remoteproc/remoteproc_sysfs.c
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -73,6 +73,7 @@ static ssize_t firmware_store(struct device *dev,
[RPROC_SUSPENDED] = "suspended",
[RPROC_RUNNING] = "running",
[RPROC_CRASHED] = "crashed",
+ [RPROC_DELETED] = "deleted",
[RPROC_LAST] = "invalid",
};

diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index e2f3a32..25a8c37 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -346,6 +346,7 @@ struct rproc_ops {
* a message.
* @RPROC_RUNNING: device is up and running
* @RPROC_CRASHED: device has crashed; need to start recovery
+ * @RPROC_DELETED: device is deleted
* @RPROC_LAST: just keep this one at the end
*
* Please note that the values of these states are used as indices
@@ -359,7 +360,8 @@ enum rproc_state {
RPROC_SUSPENDED = 1,
RPROC_RUNNING = 2,
RPROC_CRASHED = 3,
- RPROC_LAST = 4,
+ RPROC_DELETED = 4,
+ RPROC_LAST = 5,
};

/**
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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