Patch "remoteproc: k3-r5: Delay notification of wakeup event" has been added to the 6.6-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    remoteproc: k3-r5: Delay notification of wakeup event

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     remoteproc-k3-r5-delay-notification-of-wakeup-event.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 776d9622c6d6a3b926e67c8bb1af1b5c35a9e15b
Author: Udit Kumar <u-kumar1@xxxxxx>
Date:   Tue Aug 20 16:20:04 2024 +0530

    remoteproc: k3-r5: Delay notification of wakeup event
    
    [ Upstream commit 8fa052c29e509f3e47d56d7fc2ca28094d78c60a ]
    
    Few times, core1 was scheduled to boot first before core0, which leads
    to error:
    
    'k3_r5_rproc_start: can not start core 1 before core 0'.
    
    This was happening due to some scheduling between prepare and start
    callback. The probe function waits for event, which is getting
    triggered by prepare callback. To avoid above condition move event
    trigger to start instead of prepare callback.
    
    Fixes: 61f6f68447ab ("remoteproc: k3-r5: Wait for core0 power-up before powering up core1")
    Signed-off-by: Udit Kumar <u-kumar1@xxxxxx>
    [ Applied wakeup event trigger only for Split-Mode booted rprocs ]
    Signed-off-by: Beleswar Padhi <b-padhi@xxxxxx>
    Cc: stable@xxxxxxxxxxxxxxx
    Link: https://lore.kernel.org/r/20240820105004.2788327-1-b-padhi@xxxxxx
    Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
index 15fc663389096..5491b1b17ca36 100644
--- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
@@ -469,8 +469,6 @@ static int k3_r5_rproc_prepare(struct rproc *rproc)
 			ret);
 		return ret;
 	}
-	core->released_from_reset = true;
-	wake_up_interruptible(&cluster->core_transition);
 
 	/*
 	 * Newer IP revisions like on J7200 SoCs support h/w auto-initialization
@@ -587,6 +585,9 @@ static int k3_r5_rproc_start(struct rproc *rproc)
 		ret = k3_r5_core_run(core);
 		if (ret)
 			return ret;
+
+		core->released_from_reset = true;
+		wake_up_interruptible(&cluster->core_transition);
 	}
 
 	return 0;