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From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: ohad@wizery.com, bjorn.andersson@linaro.org
Cc: linux-remoteproc@vger.kernel.org
Subject: [PATCH v2 01/14] remoteproc: Re-check state in rproc_shutdown()
Date: Fri, 30 Oct 2020 13:57:00 -0600	[thread overview]
Message-ID: <20201030195713.1366341-2-mathieu.poirier@linaro.org> (raw)
In-Reply-To: <20201030195713.1366341-1-mathieu.poirier@linaro.org>

The state of the remote processor may have changed between the
time a call to rproc_shutdown() was made and the time it is
executed.  To avoid moving forward with an operation that may
have been cancelled, recheck while holding the mutex.

Cc: <stable@vger.kernel.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/remoteproc/remoteproc_core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index dab2c0f5caf0..e55568d1e7e2 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1857,6 +1857,9 @@ void rproc_shutdown(struct rproc *rproc)
 		return;
 	}
 
+	if (rproc->state != RPROC_RUNNING)
+		goto out;
+
 	/* if the remote proc is still needed, bail out */
 	if (!atomic_dec_and_test(&rproc->power))
 		goto out;
-- 
2.25.1


  reply	other threads:[~2020-10-30 19:57 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-30 19:56 [PATCH v2 00/14] remoteproc: Add support for detaching from rproc Mathieu Poirier
2020-10-30 19:57 ` Mathieu Poirier [this message]
2020-11-09  9:40   ` [PATCH v2 01/14] remoteproc: Re-check state in rproc_shutdown() Arnaud POULIQUEN
2020-10-30 19:57 ` [PATCH v2 02/14] remoteproc: Remove useless check in rproc_del() Mathieu Poirier
2020-11-09  9:40   ` Arnaud POULIQUEN
2020-10-30 19:57 ` [PATCH v2 03/14] remoteproc: Add new RPROC_ATTACHED state Mathieu Poirier
2020-11-09  9:41   ` Arnaud POULIQUEN
2020-10-30 19:57 ` [PATCH v2 04/14] remoteproc: Properly represent the attached state Mathieu Poirier
2020-11-09  9:41   ` Arnaud POULIQUEN
2020-10-30 19:57 ` [PATCH v2 05/14] remoteproc: Properly deal with a kernel panic when attached Mathieu Poirier
2020-11-09  9:41   ` Arnaud POULIQUEN
2020-10-30 19:57 ` [PATCH v2 06/14] remoteproc: Add new detach() remoteproc operation Mathieu Poirier
2020-11-06 17:31   ` Arnaud POULIQUEN
2020-11-19 23:06     ` Mathieu Poirier
2020-10-30 19:57 ` [PATCH v2 07/14] remoteproc: Introduce function __rproc_detach() Mathieu Poirier
2020-11-06 17:43   ` Arnaud POULIQUEN
2020-11-19 23:27     ` Mathieu Poirier
2020-10-30 19:57 ` [PATCH v2 08/14] remoteproc: Introduce function rproc_detach() Mathieu Poirier
2020-11-09  9:05   ` Arnaud POULIQUEN
2020-11-19 23:40     ` Mathieu Poirier
2020-10-30 19:57 ` [PATCH v2 09/14] remoteproc: Rename function rproc_actuate() Mathieu Poirier
2020-11-09  9:41   ` Arnaud POULIQUEN
2020-10-30 19:57 ` [PATCH v2 10/14] remoteproc: Add return value to function rproc_shutdown() Mathieu Poirier
2020-11-09  9:14   ` Arnaud POULIQUEN
2020-11-19 23:46     ` Mathieu Poirier
2020-10-30 19:57 ` [PATCH v2 11/14] remoteproc: Properly deal with a stop request when attached Mathieu Poirier
2020-11-09  9:42   ` Arnaud POULIQUEN
2020-11-12 17:36   ` Arnaud POULIQUEN
2020-10-30 19:57 ` [PATCH v2 12/14] remoteproc: Properly deal with detach request Mathieu Poirier
2020-10-30 19:57 ` [RFC v2 13/14] remoteproc: Add automation flags Mathieu Poirier
2020-11-06 14:38   ` Arnaud POULIQUEN
2020-11-06 17:20     ` Mathieu Poirier
2020-11-12 13:56   ` Arnaud POULIQUEN
2020-11-13 21:27     ` Mathieu Poirier
2020-11-16 10:21       ` Arnaud POULIQUEN
2020-11-20 20:40         ` Mathieu Poirier
2020-10-30 19:57 ` [RFC v2 14/14] remoteproc: Refactor rproc delete and cdev release path Mathieu Poirier
2020-11-12 18:20 ` [PATCH v2 00/14] remoteproc: Add support for detaching from rproc Arnaud POULIQUEN
2020-11-12 18:41   ` Mathieu Poirier

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