This is a note to let you know that I've just added the patch titled
Revert "mei: vsc: Call wake_up() in the threaded IRQ handler"
to the 6.8-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:
revert-mei-vsc-call-wake_up-in-the-threaded-irq-handler.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e3dc66d998d2b0c2734db9ca1d6c94c97349529a Mon Sep 17 00:00:00 2001
From: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Date: Wed, 3 Apr 2024 13:13:40 +0800
Subject: Revert "mei: vsc: Call wake_up() in the threaded IRQ handler"
From: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
commit e3dc66d998d2b0c2734db9ca1d6c94c97349529a upstream.
This reverts commit 058a38acba15fd8e7b262ec6e17c4204cb15f984.
It's not necessary to avoid a spinlock, a sleeping lock on PREEMPT_RT, in
an interrupt handler as the interrupt handler itself would be called in a
process context if PREEMPT_RT is enabled. So revert the patch.
Cc: stable@xxxxxxxxxxxxxxx # for 6.8
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Acked-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
Link: https://lore.kernel.org/r/20240403051341.3534650-1-wentong.wu@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/misc/mei/vsc-tp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/misc/mei/vsc-tp.c
+++ b/drivers/misc/mei/vsc-tp.c
@@ -419,6 +419,8 @@ static irqreturn_t vsc_tp_isr(int irq, v
atomic_inc(&tp->assert_cnt);
+ wake_up(&tp->xfer_wait);
+
return IRQ_WAKE_THREAD;
}
@@ -426,8 +428,6 @@ static irqreturn_t vsc_tp_thread_isr(int
{
struct vsc_tp *tp = data;
- wake_up(&tp->xfer_wait);
-
if (tp->event_notify)
tp->event_notify(tp->event_notify_context);
Patches currently in stable-queue which might be from sakari.ailus@xxxxxxxxxxxxxxx are
queue-6.8/mei-vsc-unregister-interrupt-handler-for-system-suspend.patch
queue-6.8/revert-mei-vsc-call-wake_up-in-the-threaded-irq-handler.patch
