Re: [PATCH v2] remoteproc: core: do pm relax when in RPROC_OFFLINE

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On 9/15/2022 8:47 PM, Mukesh Ojha wrote:
Hi,

On 9/15/2022 3:34 PM, Maria Yu wrote:
RPROC_OFFLINE state indicate there is no recovery process
is in progress and no chance to do the pm_relax.
Because when recovering from crash, rproc->lock is hold and

s/hold/held ?

Thanks.
state is RPROC_CRASHED -> RPROC_OFFLINE -> RPROC_RUNNING,
and then unlock rproc->lock.
When the state is in RPROC_OFFLINE it means separate request
of rproc_stop was done and no need to hold the wakeup source
in crash handler to recover any more.

Signed-off-by: Maria Yu <quic_aiquny@xxxxxxxxxxx>
---
  drivers/remoteproc/remoteproc_core.c | 11 +++++++++++
  1 file changed, 11 insertions(+)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index e5279ed9a8d7..247ced6b0655 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1956,6 +1956,17 @@ static void rproc_crash_handler_work(struct work_struct *work)       if (rproc->state == RPROC_CRASHED || rproc->state == RPROC_OFFLINE) {
          /* handle only the first crash detected */
          mutex_unlock(&rproc->lock);
+        /*
+         * RPROC_OFFLINE state indicate there is no recovery process
+         * is in progress and no chance to have pm_relax in place.
+         * Because when recovering from crash, rproc->lock is hold and

..ditto..

+         * state is RPROC_CRASHED -> RPROC_OFFLINE -> RPROC_RUNNING,
+         * and then unlock rproc->lock.
+         * RPROC_OFFLINE is only an intermediate state in recovery
+         * process.
+         */
+        if (rproc->state == RPROC_OFFLINE)
+            pm_relax(rproc->dev.parent);


Looks good, apart from minor nit.
:)

Reviewed-by: Mukesh Ojha <quic_mojha@xxxxxxxxxxx>

-Mukesh
          return;
      }


--
Thx and BRs,
Aiqun(Maria) Yu



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