[PATCH 01/13] remoteproc: Re-check state in rproc_shutdown()

[Mathieu Poirier]

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: <sta...@vger.kernel.org>
Signed-off-by: Mathieu Poirier <mathieu.poir...@linaro.org>
---
 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 7f90eeea67e2..fb2632cbd2df 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1834,6 +1834,9 @@ 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