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From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: bjorn.andersson@linaro.org, ohad@wizery.com
Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 09/13] remoteproc: Add return value to function rproc_shutdown()
Date: Wed, 26 Aug 2020 10:45:25 -0600
Message-ID: <20200826164529.224476-10-mathieu.poirier@linaro.org> (raw)
In-Reply-To: <20200826164529.224476-1-mathieu.poirier@linaro.org>

Add a return value to function rproc_shutdown() in order to
properly deal with error conditions that may occur.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c | 13 +++++++++----
 include/linux/remoteproc.h           |  2 +-
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index c4b80ce6f22d..c6c6aba66098 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1846,7 +1846,7 @@ EXPORT_SYMBOL(rproc_boot);
  *   returns, and users can still use it with a subsequent rproc_boot(), if
  *   needed.
  */
-void rproc_shutdown(struct rproc *rproc)
+int rproc_shutdown(struct rproc *rproc)
 {
 	struct device *dev = &rproc->dev;
 	int ret;
@@ -1854,15 +1854,19 @@ void rproc_shutdown(struct rproc *rproc)
 	ret = mutex_lock_interruptible(&rproc->lock);
 	if (ret) {
 		dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, ret);
-		return;
+		return ret;
 	}
 
-	if (rproc->state != RPROC_RUNNING)
+	if (rproc->state != RPROC_RUNNING) {
+		ret = -EPERM;
 		goto out;
+	}
 
 	/* if the remote proc is still needed, bail out */
-	if (!atomic_dec_and_test(&rproc->power))
+	if (!atomic_dec_and_test(&rproc->power)) {
+		ret = -EBUSY;
 		goto out;
+	}
 
 	ret = rproc_stop(rproc, false);
 	if (ret) {
@@ -1884,6 +1888,7 @@ void rproc_shutdown(struct rproc *rproc)
 	rproc->table_ptr = NULL;
 out:
 	mutex_unlock(&rproc->lock);
+	return ret;
 }
 EXPORT_SYMBOL(rproc_shutdown);
 
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 6250491ee851..40eccfbc1357 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -655,7 +655,7 @@ rproc_of_resm_mem_entry_init(struct device *dev, u32 of_resm_idx, size_t len,
 			     u32 da, const char *name, ...);
 
 int rproc_boot(struct rproc *rproc);
-void rproc_shutdown(struct rproc *rproc);
+int rproc_shutdown(struct rproc *rproc);
 int rproc_detach(struct rproc *rproc);
 void rproc_report_crash(struct rproc *rproc, enum rproc_crash_type type);
 int rproc_coredump_add_segment(struct rproc *rproc, dma_addr_t da, size_t size);
-- 
2.25.1


  parent reply index

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-26 16:45 [PATCH 00/13] remoteproc: Add support for detaching from rproc Mathieu Poirier
2020-08-26 16:45 ` [PATCH 01/13] remoteproc: Re-check state in rproc_shutdown() Mathieu Poirier
2020-10-15  1:28   ` Peng Fan
2020-08-26 16:45 ` [PATCH 02/13] remoteproc: Remove useless check in rproc_del() Mathieu Poirier
2020-10-15  1:29   ` Peng Fan
2020-08-26 16:45 ` [PATCH 03/13] remoteproc: Add new RPROC_ATTACHED state Mathieu Poirier
2020-10-15  1:31   ` Peng Fan
2020-08-26 16:45 ` [PATCH 04/13] remoteproc: Properly represent the attached state Mathieu Poirier
2020-10-15  1:33   ` Peng Fan
2020-08-26 16:45 ` [PATCH 05/13] remoteproc: Add new detach() remoteproc operation Mathieu Poirier
2020-10-15  1:37   ` Peng Fan
2020-10-22 21:51     ` Mathieu Poirier
2020-08-26 16:45 ` [PATCH 06/13] remoteproc: Introduce function __rproc_detach() Mathieu Poirier
2020-10-15  1:39   ` Peng Fan
2020-08-26 16:45 ` [PATCH 07/13] remoteproc: Introduce function rproc_detach() Mathieu Poirier
2020-10-15  1:52   ` Peng Fan
2020-10-22 21:55     ` Mathieu Poirier
2020-08-26 16:45 ` [PATCH 08/13] remoteproc: Rename function rproc_actuate() Mathieu Poirier
2020-10-15  2:15   ` Peng Fan
2020-08-26 16:45 ` Mathieu Poirier [this message]
2020-10-15  2:21   ` [PATCH 09/13] remoteproc: Add return value to function rproc_shutdown() Peng Fan
2020-08-26 16:45 ` [PATCH 10/13] remoteproc: Properly deal with a stop request when attached Mathieu Poirier
2020-10-15  2:29   ` Peng Fan
2020-08-26 16:45 ` [PATCH 11/13] remoteproc: Properly deal with detach request Mathieu Poirier
2020-10-15  2:30   ` Peng Fan
2020-08-26 16:45 ` [PATCH 12/13] remoteproc: Refactor rproc delete and cdev release path Mathieu Poirier
2020-10-15  2:31   ` Peng Fan
2020-08-26 16:45 ` [PATCH 13/13] remoteproc: Properly deal with a kernel panic when attached Mathieu Poirier
2020-10-15  2:28   ` Peng Fan
2020-09-01 16:55 ` [PATCH 00/13] remoteproc: Add support for detaching from rproc Arnaud POULIQUEN
2020-09-01 18:02   ` Mathieu Poirier

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