diff mbox series

[v4,02/17] remoteproc: Re-check state in rproc_shutdown()

Message ID 20201218173228.2277032-3-mathieu.poirier@linaro.org
State Superseded
Headers show
Series remoteproc: Add support for detaching a rproc | expand

Commit Message

Mathieu Poirier Dec. 18, 2020, 5:32 p.m. UTC 
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(+)

-- 
2.25.1
diff mbox series

Patch

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;