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From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: ohad@wizery.com, bjorn.andersson@linaro.org, robh+dt@kernel.org
Cc: arnaud.pouliquen@st.com, linux-remoteproc@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v4 02/17] remoteproc: Re-check state in rproc_shutdown()
Date: Fri, 18 Dec 2020 10:32:13 -0700	[thread overview]
Message-ID: <20201218173228.2277032-3-mathieu.poirier@linaro.org> (raw)
In-Reply-To: <20201218173228.2277032-1-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>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.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


  parent reply	other threads:[~2020-12-18 17:34 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-18 17:32 [PATCH v4 00/17] remoteproc: Add support for detaching a rproc Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 01/17] dt-bindings: remoteproc: Add bindind to support autonomous processors Mathieu Poirier
2021-01-20 15:53   ` Rob Herring
2020-12-18 17:32 ` Mathieu Poirier [this message]
2020-12-18 17:32 ` [PATCH v4 03/17] remoteproc: Remove useless check in rproc_del() Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 04/17] remoteproc: Rename function rproc_actuate() Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 05/17] remoteproc: Add new get_loaded_rsc_table() remoteproc operation Mathieu Poirier
2021-01-27  8:44   ` Arnaud POULIQUEN
2021-01-29 21:37     ` Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 06/17] remoteproc: stm32: Move resource table setup to rproc_ops Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 07/17] remoteproc: Add new RPROC_ATTACHED state Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 08/17] remoteproc: Properly represent the attached state Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 09/17] remoteproc: Properly deal with a kernel panic when attached Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 10/17] remoteproc: Add new detach() remoteproc operation Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 11/17] remoteproc: Introduce function __rproc_detach() Mathieu Poirier
2021-01-27  8:46   ` Arnaud POULIQUEN
2021-01-29 22:17     ` Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 12/17] remoteproc: Introduce function rproc_detach() Mathieu Poirier
2021-01-27  8:50   ` Arnaud POULIQUEN
2021-01-29 22:31     ` Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 13/17] remoteproc: Add return value to function rproc_shutdown() Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 14/17] remoteproc: Properly deal with a stop request when attached Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 15/17] remoteproc: Properly deal with a start " Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 16/17] remoteproc: Properly deal with detach request Mathieu Poirier
2020-12-18 17:32 ` [PATCH v4 17/17] remoteproc: Refactor rproc delete and cdev release path Mathieu Poirier
2021-01-27  8:56   ` Arnaud POULIQUEN
2021-01-27  9:21 ` [PATCH v4 00/17] remoteproc: Add support for detaching a rproc Arnaud POULIQUEN
2021-02-02  0:49   ` Mathieu Poirier
2021-02-02  8:54     ` Arnaud POULIQUEN
2021-02-02 22:42       ` Mathieu Poirier
2021-02-03  7:58         ` Arnaud POULIQUEN
2021-02-08 23:43           ` Mathieu Poirier

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