FAILED: patch "[PATCH] remoteproc: k3-r5: Delay notification of wakeup event" failed to apply to 6.6-stable tree

The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 8fa052c29e509f3e47d56d7fc2ca28094d78c60a
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2024100723-unbutton-eldercare-a61f@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

8fa052c29e50 ("remoteproc: k3-r5: Delay notification of wakeup event") f3f11cfe8907 ("remoteproc: k3-r5: Acquire mailbox handle during probe routine") 3c8a9066d584 ("remoteproc: k3-r5: Do not allow core1 to power up before core0 via sysfs")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 8fa052c29e509f3e47d56d7fc2ca28094d78c60a Mon Sep 17 00:00:00 2001
From: Udit Kumar <[email protected]>
Date: Tue, 20 Aug 2024 16:20:04 +0530
Subject: [PATCH] remoteproc: k3-r5: Delay notification of wakeup event

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.

index 0a9fe53dd40d..60bd2042b0c6 100644
@@ -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;