linux-kernel - [PATCH v2 1/2] remoteproc: Add RPROC

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Date:   Mon, 23 Jan 2017 17:53:18 -0800
From:   Sarangdhar Joshi <spjoshi@...eaurora.org>
To:     Ohad Ben-Cohen <ohad@...ery.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Loic Pallardy <loic.pallardy@...com>,
        Santosh Shilimkar <ssantosh@...nel.org>
Cc:     Sarangdhar Joshi <spjoshi@...eaurora.org>,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, Dave Gerlach <d-gerlach@...com>,
        Suman Anna <s-anna@...com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Trilok Soni <tsoni@...eaurora.org>
Subject: [PATCH v2 1/2] remoteproc: Add RPROC_DELETED state

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@...com>
CC: Bjorn Andersson <bjorn.andersson@...aro.org>
Signed-off-by: Sarangdhar Joshi <spjoshi@...eaurora.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,
 };
 
 /**
-- 
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a Linux Foundation Collaborative Project