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Message-Id: <20240403051341.3534650-1-wentong.wu@intel.com>
Date: Wed, 3 Apr 2024 13:13:40 +0800
From: Wentong Wu <wentong.wu@...el.com>
To: sakari.ailus@...ux.intel.com,
tomas.winkler@...el.com,
gregkh@...uxfoundation.org
Cc: linux-kernel@...r.kernel.org,
hao.yao@...el.com,
stable@...r.kernel.org
Subject: [PATCH v2 1/2] Revert "mei: vsc: Call wake_up() in the threaded IRQ handler"
From: Sakari Ailus <sakari.ailus@...ux.intel.com>
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@...r.kernel.org # for 6.8
Signed-off-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
---
drivers/misc/mei/vsc-tp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/mei/vsc-tp.c b/drivers/misc/mei/vsc-tp.c
index ecfb70cd057c..968a92a7425d 100644
--- 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, void *data)
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 irq, void *data)
{
struct vsc_tp *tp = data;
- wake_up(&tp->xfer_wait);
-
if (tp->event_notify)
tp->event_notify(tp->event_notify_context);
--
2.34.1
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