6.8-stable review patch. If anyone has any objections, please let me know.
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From: Sakari Ailus sakari.ailus@linux.intel.com
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@vger.kernel.org # for 6.8 Signed-off-by: Sakari Ailus sakari.ailus@linux.intel.com Acked-by: Tomas Winkler tomas.winkler@intel.com Link: https://lore.kernel.org/r/20240403051341.3534650-1-wentong.wu@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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);